./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-difference-det.wvr.c --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-02-07_10-47-16.files/SV-COMP24_unreach-call/popl20-difference-det.wvr.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 958ec4d9 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-difference-det.wvr.c ./goblint.2024-02-07_10-47-16.files/SV-COMP24_unreach-call/popl20-difference-det.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-dev-958ec4d-m [2024-02-07 14:38:12,756 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-02-07 14:38:12,828 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-02-07 14:38:12,832 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-02-07 14:38:12,833 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-02-07 14:38:12,859 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-02-07 14:38:12,860 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-02-07 14:38:12,860 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-02-07 14:38:12,861 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-02-07 14:38:12,865 INFO L153 SettingsManager]: * Use memory slicer=true [2024-02-07 14:38:12,866 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-02-07 14:38:12,866 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-02-07 14:38:12,867 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-02-07 14:38:12,868 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-02-07 14:38:12,868 INFO L153 SettingsManager]: * Use SBE=true [2024-02-07 14:38:12,868 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-02-07 14:38:12,869 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-02-07 14:38:12,869 INFO L153 SettingsManager]: * sizeof long=4 [2024-02-07 14:38:12,869 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-02-07 14:38:12,869 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-02-07 14:38:12,869 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-02-07 14:38:12,870 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-02-07 14:38:12,870 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-02-07 14:38:12,870 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-02-07 14:38:12,870 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-02-07 14:38:12,871 INFO L153 SettingsManager]: * sizeof long double=12 [2024-02-07 14:38:12,871 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-02-07 14:38:12,871 INFO L153 SettingsManager]: * Use constant arrays=true [2024-02-07 14:38:12,872 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-02-07 14:38:12,872 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-02-07 14:38:12,873 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-02-07 14:38:12,873 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-02-07 14:38:12,873 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-07 14:38:12,873 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-02-07 14:38:12,873 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-02-07 14:38:12,873 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-02-07 14:38:12,874 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-02-07 14:38:12,874 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-02-07 14:38:12,874 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-02-07 14:38:12,874 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-02-07 14:38:12,874 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-02-07 14:38:12,875 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-02-07 14:38:12,875 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-02-07 14:38:12,875 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-02-07 14:38:13,078 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-02-07 14:38:13,101 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-02-07 14:38:13,105 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-02-07 14:38:13,106 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-02-07 14:38:13,106 INFO L274 PluginConnector]: Witness Parser initialized [2024-02-07 14:38:13,107 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-02-07_10-47-16.files/SV-COMP24_unreach-call/popl20-difference-det.wvr.yml/witness.yml [2024-02-07 14:38:13,199 INFO L270 PluginConnector]: Initializing CDTParser... [2024-02-07 14:38:13,199 INFO L274 PluginConnector]: CDTParser initialized [2024-02-07 14:38:13,201 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-difference-det.wvr.c [2024-02-07 14:38:14,154 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-02-07 14:38:14,350 INFO L384 CDTParser]: Found 1 translation units. [2024-02-07 14:38:14,350 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-difference-det.wvr.c [2024-02-07 14:38:14,356 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6d556ce86/6f61ec5ad960425fa2dd6613dab88a93/FLAG884cea3e1 [2024-02-07 14:38:14,374 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6d556ce86/6f61ec5ad960425fa2dd6613dab88a93 [2024-02-07 14:38:14,375 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-02-07 14:38:14,377 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-02-07 14:38:14,378 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-02-07 14:38:14,378 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-02-07 14:38:14,382 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-02-07 14:38:14,383 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 02:38:13" (1/2) ... [2024-02-07 14:38:14,384 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@395fbf1a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:38:14, skipping insertion in model container [2024-02-07 14:38:14,384 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 02:38:13" (1/2) ... [2024-02-07 14:38:14,385 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2c8d767b and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:38:14, skipping insertion in model container [2024-02-07 14:38:14,385 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 02:38:14" (2/2) ... [2024-02-07 14:38:14,386 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@395fbf1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:38:14, skipping insertion in model container [2024-02-07 14:38:14,386 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 02:38:14" (2/2) ... [2024-02-07 14:38:14,387 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-02-07 14:38:14,403 INFO L74 edCorrectnessWitness]: Found the following entries in the witness: [2024-02-07 14:38:14,404 INFO L76 edCorrectnessWitness]: Location invariant before [L44-L44] -2147483647 <= counter1 [2024-02-07 14:38:14,404 INFO L76 edCorrectnessWitness]: Location invariant before [L76-L76] counter2 <= 2147483646 [2024-02-07 14:38:14,404 INFO L76 edCorrectnessWitness]: Location invariant before [L55-L55] counter1 <= 2147483646 [2024-02-07 14:38:14,404 INFO L76 edCorrectnessWitness]: Location invariant before [L65-L65] -2147483647 <= counter2 [2024-02-07 14:38:14,423 INFO L178 MainTranslator]: Built tables and reachable declarations [2024-02-07 14:38:14,589 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-difference-det.wvr.c[2559,2572] [2024-02-07 14:38:14,598 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-02-07 14:38:14,647 INFO L203 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-02-07 14:38:14,719 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-difference-det.wvr.c[2559,2572] [2024-02-07 14:38:14,721 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-02-07 14:38:14,733 INFO L207 MainTranslator]: Completed translation [2024-02-07 14:38:14,734 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:38:14 WrapperNode [2024-02-07 14:38:14,734 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-02-07 14:38:14,735 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-02-07 14:38:14,736 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-02-07 14:38:14,736 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-02-07 14:38:14,741 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:38:14" (1/1) ... [2024-02-07 14:38:14,754 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:38:14" (1/1) ... [2024-02-07 14:38:14,776 INFO L138 Inliner]: procedures = 23, calls = 41, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 127 [2024-02-07 14:38:14,776 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-02-07 14:38:14,777 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-02-07 14:38:14,777 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-02-07 14:38:14,777 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-02-07 14:38:14,785 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:38:14" (1/1) ... [2024-02-07 14:38:14,786 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:38:14" (1/1) ... [2024-02-07 14:38:14,795 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:38:14" (1/1) ... [2024-02-07 14:38:14,816 INFO L175 MemorySlicer]: Split 10 memory accesses to 5 slices as follows [2, 2, 2, 2, 2]. 20 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 4 writes are split as follows [0, 1, 1, 1, 1]. [2024-02-07 14:38:14,816 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:38:14" (1/1) ... [2024-02-07 14:38:14,817 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:38:14" (1/1) ... [2024-02-07 14:38:14,827 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:38:14" (1/1) ... [2024-02-07 14:38:14,830 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:38:14" (1/1) ... [2024-02-07 14:38:14,833 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:38:14" (1/1) ... [2024-02-07 14:38:14,834 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:38:14" (1/1) ... [2024-02-07 14:38:14,838 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-02-07 14:38:14,839 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-02-07 14:38:14,840 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-02-07 14:38:14,840 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-02-07 14:38:14,840 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:38:14" (1/1) ... [2024-02-07 14:38:14,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-07 14:38:14,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:38:14,866 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) [2024-02-07 14:38:14,884 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 [2024-02-07 14:38:14,896 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-02-07 14:38:14,896 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-02-07 14:38:14,896 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-02-07 14:38:14,896 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-02-07 14:38:14,896 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-02-07 14:38:14,897 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-02-07 14:38:14,897 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-02-07 14:38:14,897 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2024-02-07 14:38:14,897 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2024-02-07 14:38:14,897 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-02-07 14:38:14,897 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-02-07 14:38:14,897 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-02-07 14:38:14,898 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-02-07 14:38:14,898 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-02-07 14:38:14,898 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-02-07 14:38:14,899 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-02-07 14:38:14,899 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-02-07 14:38:14,900 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-02-07 14:38:14,900 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-02-07 14:38:14,900 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-02-07 14:38:14,900 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-02-07 14:38:14,900 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-02-07 14:38:14,901 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-02-07 14:38:14,901 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-02-07 14:38:14,901 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-02-07 14:38:14,901 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-02-07 14:38:14,901 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-02-07 14:38:14,901 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-02-07 14:38:14,901 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-02-07 14:38:14,902 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-02-07 14:38:14,903 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-02-07 14:38:15,010 INFO L244 CfgBuilder]: Building ICFG [2024-02-07 14:38:15,013 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-02-07 14:38:15,233 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-02-07 14:38:15,233 INFO L293 CfgBuilder]: Performing block encoding [2024-02-07 14:38:15,324 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-02-07 14:38:15,324 INFO L320 CfgBuilder]: Removed 4 assume(true) statements. [2024-02-07 14:38:15,325 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.02 02:38:15 BoogieIcfgContainer [2024-02-07 14:38:15,325 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-02-07 14:38:15,326 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-02-07 14:38:15,326 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-02-07 14:38:15,329 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-02-07 14:38:15,329 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 02:38:13" (1/4) ... [2024-02-07 14:38:15,329 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b14df2 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 07.02 02:38:15, skipping insertion in model container [2024-02-07 14:38:15,330 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.02 02:38:14" (2/4) ... [2024-02-07 14:38:15,330 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b14df2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 02:38:15, skipping insertion in model container [2024-02-07 14:38:15,330 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:38:14" (3/4) ... [2024-02-07 14:38:15,330 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b14df2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 02:38:15, skipping insertion in model container [2024-02-07 14:38:15,330 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.02 02:38:15" (4/4) ... [2024-02-07 14:38:15,331 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-difference-det.wvr.c [2024-02-07 14:38:15,344 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-02-07 14:38:15,344 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2024-02-07 14:38:15,344 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-02-07 14:38:15,379 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-02-07 14:38:15,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 56 places, 47 transitions, 122 flow [2024-02-07 14:38:15,423 INFO L124 PetriNetUnfolderBase]: 4/43 cut-off events. [2024-02-07 14:38:15,423 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-02-07 14:38:15,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 43 events. 4/43 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 68 event pairs, 0 based on Foata normal form. 0/34 useless extension candidates. Maximal degree in co-relation 37. Up to 2 conditions per place. [2024-02-07 14:38:15,426 INFO L82 GeneralOperation]: Start removeDead. Operand has 56 places, 47 transitions, 122 flow [2024-02-07 14:38:15,428 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 51 places, 42 transitions, 108 flow [2024-02-07 14:38:15,435 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-07 14:38:15,440 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;@61b3cc9d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-07 14:38:15,440 INFO L358 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2024-02-07 14:38:15,444 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-07 14:38:15,444 INFO L124 PetriNetUnfolderBase]: 0/9 cut-off events. [2024-02-07 14:38:15,444 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-07 14:38:15,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:38:15,445 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-02-07 14:38:15,445 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread3Err0ASSERT_VIOLATIONWITNESS_INVARIANT (and 10 more)] === [2024-02-07 14:38:15,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:38:15,449 INFO L85 PathProgramCache]: Analyzing trace with hash 385543227, now seen corresponding path program 1 times [2024-02-07 14:38:15,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:38:15,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241773340] [2024-02-07 14:38:15,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:38:15,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:38:15,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:38:15,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:38:15,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:38:15,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241773340] [2024-02-07 14:38:15,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241773340] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:38:15,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:38:15,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-02-07 14:38:15,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984290428] [2024-02-07 14:38:15,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:38:15,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 14:38:15,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:38:15,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 14:38:15,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 14:38:15,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 47 [2024-02-07 14:38:15,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 42 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 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) [2024-02-07 14:38:15,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:38:15,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 47 [2024-02-07 14:38:15,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:38:16,509 INFO L124 PetriNetUnfolderBase]: 7260/9845 cut-off events. [2024-02-07 14:38:16,543 INFO L125 PetriNetUnfolderBase]: For 529/529 co-relation queries the response was YES. [2024-02-07 14:38:16,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20074 conditions, 9845 events. 7260/9845 cut-off events. For 529/529 co-relation queries the response was YES. Maximal size of possible extension queue 506. Compared 50976 event pairs, 2216 based on Foata normal form. 233/8571 useless extension candidates. Maximal degree in co-relation 16010. Up to 6797 conditions per place. [2024-02-07 14:38:16,605 INFO L140 encePairwiseOnDemand]: 42/47 looper letters, 64 selfloop transitions, 2 changer transitions 0/71 dead transitions. [2024-02-07 14:38:16,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 71 transitions, 319 flow [2024-02-07 14:38:16,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 14:38:16,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 14:38:16,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 96 transitions. [2024-02-07 14:38:16,614 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6808510638297872 [2024-02-07 14:38:16,615 INFO L175 Difference]: Start difference. First operand has 51 places, 42 transitions, 108 flow. Second operand 3 states and 96 transitions. [2024-02-07 14:38:16,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 71 transitions, 319 flow [2024-02-07 14:38:16,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 71 transitions, 289 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-02-07 14:38:16,633 INFO L231 Difference]: Finished difference. Result has 46 places, 43 transitions, 108 flow [2024-02-07 14:38:16,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=108, PETRI_PLACES=46, PETRI_TRANSITIONS=43} [2024-02-07 14:38:16,637 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -5 predicate places. [2024-02-07 14:38:16,637 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 43 transitions, 108 flow [2024-02-07 14:38:16,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 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) [2024-02-07 14:38:16,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:38:16,638 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2024-02-07 14:38:16,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-02-07 14:38:16,638 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread3Err0ASSERT_VIOLATIONWITNESS_INVARIANT (and 10 more)] === [2024-02-07 14:38:16,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:38:16,639 INFO L85 PathProgramCache]: Analyzing trace with hash 976136037, now seen corresponding path program 1 times [2024-02-07 14:38:16,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:38:16,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047214046] [2024-02-07 14:38:16,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:38:16,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:38:16,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:38:16,691 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:38:16,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:38:16,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047214046] [2024-02-07 14:38:16,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047214046] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:38:16,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:38:16,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-07 14:38:16,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622038986] [2024-02-07 14:38:16,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:38:16,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 14:38:16,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:38:16,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 14:38:16,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 14:38:16,694 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 47 [2024-02-07 14:38:16,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 43 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 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) [2024-02-07 14:38:16,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:38:16,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 47 [2024-02-07 14:38:16,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:38:17,164 INFO L124 PetriNetUnfolderBase]: 6213/8399 cut-off events. [2024-02-07 14:38:17,164 INFO L125 PetriNetUnfolderBase]: For 776/776 co-relation queries the response was YES. [2024-02-07 14:38:17,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17953 conditions, 8399 events. 6213/8399 cut-off events. For 776/776 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 42001 event pairs, 4933 based on Foata normal form. 0/7284 useless extension candidates. Maximal degree in co-relation 11477. Up to 8238 conditions per place. [2024-02-07 14:38:17,204 INFO L140 encePairwiseOnDemand]: 45/47 looper letters, 36 selfloop transitions, 1 changer transitions 0/42 dead transitions. [2024-02-07 14:38:17,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 42 transitions, 178 flow [2024-02-07 14:38:17,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 14:38:17,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 14:38:17,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 64 transitions. [2024-02-07 14:38:17,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45390070921985815 [2024-02-07 14:38:17,206 INFO L175 Difference]: Start difference. First operand has 46 places, 43 transitions, 108 flow. Second operand 3 states and 64 transitions. [2024-02-07 14:38:17,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 42 transitions, 178 flow [2024-02-07 14:38:17,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 42 transitions, 176 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-07 14:38:17,208 INFO L231 Difference]: Finished difference. Result has 46 places, 42 transitions, 104 flow [2024-02-07 14:38:17,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=46, PETRI_TRANSITIONS=42} [2024-02-07 14:38:17,209 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -5 predicate places. [2024-02-07 14:38:17,209 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 42 transitions, 104 flow [2024-02-07 14:38:17,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 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) [2024-02-07 14:38:17,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:38:17,210 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:38:17,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-02-07 14:38:17,210 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thread3Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread3Err0ASSERT_VIOLATIONWITNESS_INVARIANT (and 10 more)] === [2024-02-07 14:38:17,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:38:17,211 INFO L85 PathProgramCache]: Analyzing trace with hash 319084129, now seen corresponding path program 1 times [2024-02-07 14:38:17,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:38:17,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486423270] [2024-02-07 14:38:17,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:38:17,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:38:17,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:38:17,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:38:17,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:38:17,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486423270] [2024-02-07 14:38:17,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486423270] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:38:17,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:38:17,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-02-07 14:38:17,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429985428] [2024-02-07 14:38:17,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:38:17,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 14:38:17,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:38:17,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 14:38:17,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 14:38:17,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 47 [2024-02-07 14:38:17,306 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 42 transitions, 104 flow. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 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) [2024-02-07 14:38:17,306 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:38:17,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 47 [2024-02-07 14:38:17,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:38:17,872 INFO L124 PetriNetUnfolderBase]: 7157/9933 cut-off events. [2024-02-07 14:38:17,873 INFO L125 PetriNetUnfolderBase]: For 1104/1104 co-relation queries the response was YES. [2024-02-07 14:38:17,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20860 conditions, 9933 events. 7157/9933 cut-off events. For 1104/1104 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 49955 event pairs, 2201 based on Foata normal form. 136/9098 useless extension candidates. Maximal degree in co-relation 20852. Up to 6721 conditions per place. [2024-02-07 14:38:17,913 INFO L140 encePairwiseOnDemand]: 42/47 looper letters, 60 selfloop transitions, 2 changer transitions 0/67 dead transitions. [2024-02-07 14:38:17,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 67 transitions, 291 flow [2024-02-07 14:38:17,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 14:38:17,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 14:38:17,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 90 transitions. [2024-02-07 14:38:17,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6382978723404256 [2024-02-07 14:38:17,917 INFO L175 Difference]: Start difference. First operand has 46 places, 42 transitions, 104 flow. Second operand 3 states and 90 transitions. [2024-02-07 14:38:17,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 67 transitions, 291 flow [2024-02-07 14:38:17,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 67 transitions, 290 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-07 14:38:17,920 INFO L231 Difference]: Finished difference. Result has 48 places, 43 transitions, 119 flow [2024-02-07 14:38:17,920 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=103, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=119, PETRI_PLACES=48, PETRI_TRANSITIONS=43} [2024-02-07 14:38:17,921 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -3 predicate places. [2024-02-07 14:38:17,922 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 43 transitions, 119 flow [2024-02-07 14:38:17,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 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) [2024-02-07 14:38:17,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:38:17,922 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:38:17,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-02-07 14:38:17,922 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread3Err0ASSERT_VIOLATIONWITNESS_INVARIANT (and 10 more)] === [2024-02-07 14:38:17,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:38:17,923 INFO L85 PathProgramCache]: Analyzing trace with hash 1737064334, now seen corresponding path program 1 times [2024-02-07 14:38:17,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:38:17,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962553666] [2024-02-07 14:38:17,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:38:17,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:38:17,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:38:18,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:38:18,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:38:18,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962553666] [2024-02-07 14:38:18,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962553666] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:38:18,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:38:18,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-07 14:38:18,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271992955] [2024-02-07 14:38:18,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:38:18,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 14:38:18,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:38:18,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 14:38:18,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-07 14:38:18,013 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 47 [2024-02-07 14:38:18,014 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 43 transitions, 119 flow. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 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) [2024-02-07 14:38:18,014 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:38:18,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 47 [2024-02-07 14:38:18,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:38:19,455 INFO L124 PetriNetUnfolderBase]: 13410/18877 cut-off events. [2024-02-07 14:38:19,456 INFO L125 PetriNetUnfolderBase]: For 3551/3551 co-relation queries the response was YES. [2024-02-07 14:38:19,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42600 conditions, 18877 events. 13410/18877 cut-off events. For 3551/3551 co-relation queries the response was YES. Maximal size of possible extension queue 714. Compared 111161 event pairs, 4461 based on Foata normal form. 280/17590 useless extension candidates. Maximal degree in co-relation 42590. Up to 6754 conditions per place. [2024-02-07 14:38:19,548 INFO L140 encePairwiseOnDemand]: 43/47 looper letters, 98 selfloop transitions, 5 changer transitions 0/108 dead transitions. [2024-02-07 14:38:19,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 108 transitions, 497 flow [2024-02-07 14:38:19,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-07 14:38:19,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-07 14:38:19,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 138 transitions. [2024-02-07 14:38:19,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7340425531914894 [2024-02-07 14:38:19,550 INFO L175 Difference]: Start difference. First operand has 48 places, 43 transitions, 119 flow. Second operand 4 states and 138 transitions. [2024-02-07 14:38:19,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 108 transitions, 497 flow [2024-02-07 14:38:19,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 108 transitions, 493 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-07 14:38:19,552 INFO L231 Difference]: Finished difference. Result has 52 places, 46 transitions, 157 flow [2024-02-07 14:38:19,552 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=117, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=157, PETRI_PLACES=52, PETRI_TRANSITIONS=46} [2024-02-07 14:38:19,552 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 1 predicate places. [2024-02-07 14:38:19,553 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 46 transitions, 157 flow [2024-02-07 14:38:19,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 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) [2024-02-07 14:38:19,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:38:19,553 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:38:19,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-02-07 14:38:19,553 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread3Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread3Err0ASSERT_VIOLATIONWITNESS_INVARIANT (and 10 more)] === [2024-02-07 14:38:19,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:38:19,554 INFO L85 PathProgramCache]: Analyzing trace with hash 1073082891, now seen corresponding path program 1 times [2024-02-07 14:38:19,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:38:19,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726142843] [2024-02-07 14:38:19,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:38:19,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:38:19,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:38:19,584 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:38:19,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:38:19,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726142843] [2024-02-07 14:38:19,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726142843] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:38:19,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:38:19,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-07 14:38:19,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031643677] [2024-02-07 14:38:19,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:38:19,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 14:38:19,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:38:19,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 14:38:19,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 14:38:19,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 47 [2024-02-07 14:38:19,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 46 transitions, 157 flow. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 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) [2024-02-07 14:38:19,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:38:19,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 47 [2024-02-07 14:38:19,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:38:20,364 INFO L124 PetriNetUnfolderBase]: 11127/15638 cut-off events. [2024-02-07 14:38:20,365 INFO L125 PetriNetUnfolderBase]: For 8326/8326 co-relation queries the response was YES. [2024-02-07 14:38:20,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37492 conditions, 15638 events. 11127/15638 cut-off events. For 8326/8326 co-relation queries the response was YES. Maximal size of possible extension queue 592. Compared 87882 event pairs, 9039 based on Foata normal form. 0/14910 useless extension candidates. Maximal degree in co-relation 37479. Up to 14928 conditions per place. [2024-02-07 14:38:20,428 INFO L140 encePairwiseOnDemand]: 45/47 looper letters, 39 selfloop transitions, 1 changer transitions 0/45 dead transitions. [2024-02-07 14:38:20,429 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 45 transitions, 233 flow [2024-02-07 14:38:20,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 14:38:20,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 14:38:20,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 63 transitions. [2024-02-07 14:38:20,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44680851063829785 [2024-02-07 14:38:20,430 INFO L175 Difference]: Start difference. First operand has 52 places, 46 transitions, 157 flow. Second operand 3 states and 63 transitions. [2024-02-07 14:38:20,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 45 transitions, 233 flow [2024-02-07 14:38:20,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 45 transitions, 229 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-02-07 14:38:20,433 INFO L231 Difference]: Finished difference. Result has 53 places, 45 transitions, 151 flow [2024-02-07 14:38:20,434 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=149, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=151, PETRI_PLACES=53, PETRI_TRANSITIONS=45} [2024-02-07 14:38:20,434 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 2 predicate places. [2024-02-07 14:38:20,434 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 45 transitions, 151 flow [2024-02-07 14:38:20,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 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) [2024-02-07 14:38:20,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:38:20,435 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:38:20,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-02-07 14:38:20,435 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread3Err0ASSERT_VIOLATIONWITNESS_INVARIANT (and 10 more)] === [2024-02-07 14:38:20,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:38:20,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1179081256, now seen corresponding path program 1 times [2024-02-07 14:38:20,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:38:20,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833314748] [2024-02-07 14:38:20,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:38:20,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:38:20,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:38:20,476 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:38:20,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:38:20,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833314748] [2024-02-07 14:38:20,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833314748] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:38:20,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020601861] [2024-02-07 14:38:20,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:38:20,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:38:20,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:38:20,479 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) [2024-02-07 14:38:20,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-02-07 14:38:20,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:38:20,550 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 5 conjunts are in the unsatisfiable core [2024-02-07 14:38:20,553 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:38:20,593 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:38:20,594 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:38:20,629 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:38:20,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020601861] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:38:20,630 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:38:20,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2024-02-07 14:38:20,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645095752] [2024-02-07 14:38:20,630 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:38:20,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-02-07 14:38:20,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:38:20,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-02-07 14:38:20,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-02-07 14:38:20,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 47 [2024-02-07 14:38:20,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 45 transitions, 151 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 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) [2024-02-07 14:38:20,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:38:20,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 47 [2024-02-07 14:38:20,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:38:22,739 INFO L124 PetriNetUnfolderBase]: 27909/39597 cut-off events. [2024-02-07 14:38:22,740 INFO L125 PetriNetUnfolderBase]: For 20907/20907 co-relation queries the response was YES. [2024-02-07 14:38:22,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92979 conditions, 39597 events. 27909/39597 cut-off events. For 20907/20907 co-relation queries the response was YES. Maximal size of possible extension queue 974. Compared 244278 event pairs, 5633 based on Foata normal form. 234/38583 useless extension candidates. Maximal degree in co-relation 92964. Up to 8538 conditions per place. [2024-02-07 14:38:23,121 INFO L140 encePairwiseOnDemand]: 43/47 looper letters, 215 selfloop transitions, 16 changer transitions 0/236 dead transitions. [2024-02-07 14:38:23,122 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 236 transitions, 1139 flow [2024-02-07 14:38:23,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-02-07 14:38:23,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-02-07 14:38:23,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 299 transitions. [2024-02-07 14:38:23,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7952127659574468 [2024-02-07 14:38:23,124 INFO L175 Difference]: Start difference. First operand has 53 places, 45 transitions, 151 flow. Second operand 8 states and 299 transitions. [2024-02-07 14:38:23,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 236 transitions, 1139 flow [2024-02-07 14:38:23,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 236 transitions, 1138 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-07 14:38:23,131 INFO L231 Difference]: Finished difference. Result has 65 places, 56 transitions, 303 flow [2024-02-07 14:38:23,131 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=303, PETRI_PLACES=65, PETRI_TRANSITIONS=56} [2024-02-07 14:38:23,133 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 14 predicate places. [2024-02-07 14:38:23,134 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 56 transitions, 303 flow [2024-02-07 14:38:23,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 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) [2024-02-07 14:38:23,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:38:23,134 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:38:23,168 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-02-07 14:38:23,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-02-07 14:38:23,350 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread4Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread3Err0ASSERT_VIOLATIONWITNESS_INVARIANT (and 10 more)] === [2024-02-07 14:38:23,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:38:23,350 INFO L85 PathProgramCache]: Analyzing trace with hash 403135095, now seen corresponding path program 1 times [2024-02-07 14:38:23,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:38:23,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860659141] [2024-02-07 14:38:23,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:38:23,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:38:23,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:38:23,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:38:23,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:38:23,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860659141] [2024-02-07 14:38:23,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860659141] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:38:23,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:38:23,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-07 14:38:23,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37519140] [2024-02-07 14:38:23,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:38:23,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 14:38:23,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:38:23,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 14:38:23,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-07 14:38:23,413 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 47 [2024-02-07 14:38:23,413 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 56 transitions, 303 flow. Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:38:23,413 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:38:23,413 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 47 [2024-02-07 14:38:23,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:38:27,567 INFO L124 PetriNetUnfolderBase]: 50340/71482 cut-off events. [2024-02-07 14:38:27,568 INFO L125 PetriNetUnfolderBase]: For 104873/104873 co-relation queries the response was YES. [2024-02-07 14:38:27,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 181813 conditions, 71482 events. 50340/71482 cut-off events. For 104873/104873 co-relation queries the response was YES. Maximal size of possible extension queue 1717. Compared 468594 event pairs, 15607 based on Foata normal form. 968/71407 useless extension candidates. Maximal degree in co-relation 181791. Up to 24496 conditions per place. [2024-02-07 14:38:27,929 INFO L140 encePairwiseOnDemand]: 43/47 looper letters, 129 selfloop transitions, 5 changer transitions 0/139 dead transitions. [2024-02-07 14:38:27,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 139 transitions, 1079 flow [2024-02-07 14:38:27,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-07 14:38:27,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-07 14:38:27,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 127 transitions. [2024-02-07 14:38:27,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.675531914893617 [2024-02-07 14:38:27,930 INFO L175 Difference]: Start difference. First operand has 65 places, 56 transitions, 303 flow. Second operand 4 states and 127 transitions. [2024-02-07 14:38:27,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 139 transitions, 1079 flow [2024-02-07 14:38:28,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 139 transitions, 935 flow, removed 72 selfloop flow, removed 0 redundant places. [2024-02-07 14:38:28,064 INFO L231 Difference]: Finished difference. Result has 70 places, 59 transitions, 295 flow [2024-02-07 14:38:28,065 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=255, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=295, PETRI_PLACES=70, PETRI_TRANSITIONS=59} [2024-02-07 14:38:28,065 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 19 predicate places. [2024-02-07 14:38:28,065 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 59 transitions, 295 flow [2024-02-07 14:38:28,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:38:28,066 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:38:28,066 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:38:28,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-02-07 14:38:28,066 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread4Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread3Err0ASSERT_VIOLATIONWITNESS_INVARIANT (and 10 more)] === [2024-02-07 14:38:28,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:38:28,067 INFO L85 PathProgramCache]: Analyzing trace with hash 1295866325, now seen corresponding path program 1 times [2024-02-07 14:38:28,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:38:28,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151971803] [2024-02-07 14:38:28,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:38:28,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:38:28,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:38:28,106 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:38:28,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:38:28,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151971803] [2024-02-07 14:38:28,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151971803] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:38:28,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705116689] [2024-02-07 14:38:28,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:38:28,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:38:28,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:38:28,108 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) [2024-02-07 14:38:28,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-02-07 14:38:28,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:38:28,182 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 5 conjunts are in the unsatisfiable core [2024-02-07 14:38:28,183 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:38:28,208 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:38:28,209 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:38:28,248 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:38:28,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705116689] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:38:28,248 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:38:28,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2024-02-07 14:38:28,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733489932] [2024-02-07 14:38:28,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:38:28,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-02-07 14:38:28,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:38:28,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-02-07 14:38:28,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-02-07 14:38:28,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 47 [2024-02-07 14:38:28,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 59 transitions, 295 flow. Second operand has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 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) [2024-02-07 14:38:28,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:38:28,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 47 [2024-02-07 14:38:28,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:38:39,829 INFO L124 PetriNetUnfolderBase]: 124578/178004 cut-off events. [2024-02-07 14:38:39,830 INFO L125 PetriNetUnfolderBase]: For 233028/233028 co-relation queries the response was YES. [2024-02-07 14:38:40,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 455913 conditions, 178004 events. 124578/178004 cut-off events. For 233028/233028 co-relation queries the response was YES. Maximal size of possible extension queue 3308. Compared 1281176 event pairs, 22974 based on Foata normal form. 968/177929 useless extension candidates. Maximal degree in co-relation 455887. Up to 35667 conditions per place. [2024-02-07 14:38:41,161 INFO L140 encePairwiseOnDemand]: 43/47 looper letters, 289 selfloop transitions, 16 changer transitions 0/310 dead transitions. [2024-02-07 14:38:41,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 310 transitions, 2181 flow [2024-02-07 14:38:41,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-02-07 14:38:41,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-02-07 14:38:41,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 275 transitions. [2024-02-07 14:38:41,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7313829787234043 [2024-02-07 14:38:41,164 INFO L175 Difference]: Start difference. First operand has 70 places, 59 transitions, 295 flow. Second operand 8 states and 275 transitions. [2024-02-07 14:38:41,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 310 transitions, 2181 flow [2024-02-07 14:38:41,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 310 transitions, 2177 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-02-07 14:38:41,475 INFO L231 Difference]: Finished difference. Result has 83 places, 70 transitions, 444 flow [2024-02-07 14:38:41,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=291, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=444, PETRI_PLACES=83, PETRI_TRANSITIONS=70} [2024-02-07 14:38:41,476 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 32 predicate places. [2024-02-07 14:38:41,476 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 70 transitions, 444 flow [2024-02-07 14:38:41,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 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) [2024-02-07 14:38:41,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:38:41,477 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:38:41,488 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-02-07 14:38:41,688 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,SelfDestructingSolverStorable7 [2024-02-07 14:38:41,688 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread3Err0ASSERT_VIOLATIONWITNESS_INVARIANT (and 10 more)] === [2024-02-07 14:38:41,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:38:41,689 INFO L85 PathProgramCache]: Analyzing trace with hash -1590133578, now seen corresponding path program 2 times [2024-02-07 14:38:41,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:38:41,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146064861] [2024-02-07 14:38:41,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:38:41,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:38:41,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:38:41,794 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:38:41,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:38:41,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146064861] [2024-02-07 14:38:41,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146064861] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:38:41,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395546344] [2024-02-07 14:38:41,796 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-07 14:38:41,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:38:41,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:38:41,797 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) [2024-02-07 14:38:41,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-02-07 14:38:41,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-07 14:38:41,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:38:41,883 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 9 conjunts are in the unsatisfiable core [2024-02-07 14:38:41,885 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:38:41,922 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:38:41,922 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:38:42,008 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:38:42,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395546344] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:38:42,008 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:38:42,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-02-07 14:38:42,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823396238] [2024-02-07 14:38:42,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:38:42,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-02-07 14:38:42,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:38:42,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-02-07 14:38:42,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2024-02-07 14:38:42,013 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 47 [2024-02-07 14:38:42,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 70 transitions, 444 flow. Second operand has 17 states, 17 states have (on average 11.352941176470589) internal successors, (193), 17 states have internal predecessors, (193), 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) [2024-02-07 14:38:42,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:38:42,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 47 [2024-02-07 14:38:42,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand