./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread/stack_longer-1.i --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/stack_longer-1.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7c74aec Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread/stack_longer-1.i ./goblint.2024-02-07_10-47-16.files/SV-COMP24_unreach-call/stack_longer-1.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-wip.fs.fix-undeclared-acsl-variable-e7c74ae-m [2024-02-07 19:22:51,766 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-02-07 19:22:51,845 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-02-07 19:22:51,851 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-02-07 19:22:51,851 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-02-07 19:22:51,885 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-02-07 19:22:51,886 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-02-07 19:22:51,886 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-02-07 19:22:51,887 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-02-07 19:22:51,891 INFO L153 SettingsManager]: * Use memory slicer=true [2024-02-07 19:22:51,891 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-02-07 19:22:51,892 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-02-07 19:22:51,893 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-02-07 19:22:51,894 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-02-07 19:22:51,894 INFO L153 SettingsManager]: * Use SBE=true [2024-02-07 19:22:51,894 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-02-07 19:22:51,895 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-02-07 19:22:51,895 INFO L153 SettingsManager]: * sizeof long=4 [2024-02-07 19:22:51,895 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-02-07 19:22:51,895 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-02-07 19:22:51,896 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-02-07 19:22:51,897 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-02-07 19:22:51,897 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-02-07 19:22:51,898 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-02-07 19:22:51,898 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-02-07 19:22:51,898 INFO L153 SettingsManager]: * sizeof long double=12 [2024-02-07 19:22:51,898 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-02-07 19:22:51,899 INFO L153 SettingsManager]: * Use constant arrays=true [2024-02-07 19:22:51,899 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-02-07 19:22:51,899 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-02-07 19:22:51,900 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-02-07 19:22:51,900 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-02-07 19:22:51,901 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-07 19:22:51,901 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-02-07 19:22:51,901 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-02-07 19:22:51,901 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-02-07 19:22:51,902 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-02-07 19:22:51,902 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-02-07 19:22:51,902 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-02-07 19:22:51,902 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-02-07 19:22:51,902 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-02-07 19:22:51,903 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-02-07 19:22:51,903 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-02-07 19:22:51,903 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-02-07 19:22:52,194 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-02-07 19:22:52,220 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-02-07 19:22:52,223 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-02-07 19:22:52,224 INFO L270 PluginConnector]: Initializing CDTParser... [2024-02-07 19:22:52,228 INFO L274 PluginConnector]: CDTParser initialized [2024-02-07 19:22:52,229 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/stack_longer-1.i [2024-02-07 19:22:53,396 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-02-07 19:22:53,698 INFO L384 CDTParser]: Found 1 translation units. [2024-02-07 19:22:53,698 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack_longer-1.i [2024-02-07 19:22:53,713 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/599c4320a/b242a96cd4214859a11bc6e04b939d9c/FLAGb828b3e12 [2024-02-07 19:22:53,726 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/599c4320a/b242a96cd4214859a11bc6e04b939d9c [2024-02-07 19:22:53,728 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-02-07 19:22:53,729 INFO L274 PluginConnector]: Witness Parser initialized [2024-02-07 19:22:53,730 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-02-07_10-47-16.files/SV-COMP24_unreach-call/stack_longer-1.yml/witness.yml [2024-02-07 19:22:53,797 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-02-07 19:22:53,798 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-02-07 19:22:53,800 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-02-07 19:22:53,800 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-02-07 19:22:53,804 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-02-07 19:22:53,805 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 07:22:53" (1/2) ... [2024-02-07 19:22:53,806 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1304c354 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:22:53, skipping insertion in model container [2024-02-07 19:22:53,806 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 07:22:53" (1/2) ... [2024-02-07 19:22:53,808 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4b7c29d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:22:53, skipping insertion in model container [2024-02-07 19:22:53,808 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 07:22:53" (2/2) ... [2024-02-07 19:22:53,809 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1304c354 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:22:53, skipping insertion in model container [2024-02-07 19:22:53,809 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 07:22:53" (2/2) ... [2024-02-07 19:22:53,809 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-02-07 19:22:53,839 INFO L74 edCorrectnessWitness]: Found the following entries in the witness: [2024-02-07 19:22:53,841 INFO L76 edCorrectnessWitness]: Location invariant before [L998-L998] flag == (_Bool)1 [2024-02-07 19:22:53,841 INFO L76 edCorrectnessWitness]: Location invariant before [L1011-L1011] flag == (_Bool)1 [2024-02-07 19:22:53,841 INFO L76 edCorrectnessWitness]: Location invariant before [L1008-L1008] flag == (_Bool)0 || flag == (_Bool)1 [2024-02-07 19:22:53,899 INFO L181 MainTranslator]: Built tables and reachable declarations [2024-02-07 19:22:54,352 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack_longer-1.i[41527,41540] [2024-02-07 19:22:54,395 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-02-07 19:22:54,409 INFO L206 MainTranslator]: Completed pre-run [2024-02-07 19:22:54,461 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack_longer-1.i[41527,41540] Start Parsing Local Start Parsing Local Start Parsing Local [2024-02-07 19:22:54,509 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-02-07 19:22:54,584 INFO L211 MainTranslator]: Completed translation [2024-02-07 19:22:54,585 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:22:54 WrapperNode [2024-02-07 19:22:54,585 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-02-07 19:22:54,586 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-02-07 19:22:54,586 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-02-07 19:22:54,586 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-02-07 19:22:54,592 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:22:54" (1/1) ... [2024-02-07 19:22:54,621 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:22:54" (1/1) ... [2024-02-07 19:22:54,660 INFO L138 Inliner]: procedures = 278, calls = 41, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 166 [2024-02-07 19:22:54,661 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-02-07 19:22:54,662 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-02-07 19:22:54,662 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-02-07 19:22:54,662 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-02-07 19:22:54,673 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:22:54" (1/1) ... [2024-02-07 19:22:54,673 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:22:54" (1/1) ... [2024-02-07 19:22:54,691 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:22:54" (1/1) ... [2024-02-07 19:22:54,706 INFO L175 MemorySlicer]: Split 14 memory accesses to 5 slices as follows [2, 2, 5, 2, 3]. 36 percent of accesses are in the largest equivalence class. The 7 initializations are split as follows [2, 0, 5, 0, 0]. The 4 writes are split as follows [0, 1, 0, 1, 2]. [2024-02-07 19:22:54,710 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:22:54" (1/1) ... [2024-02-07 19:22:54,711 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:22:54" (1/1) ... [2024-02-07 19:22:54,718 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:22:54" (1/1) ... [2024-02-07 19:22:54,721 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:22:54" (1/1) ... [2024-02-07 19:22:54,744 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:22:54" (1/1) ... [2024-02-07 19:22:54,745 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:22:54" (1/1) ... [2024-02-07 19:22:54,748 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-02-07 19:22:54,749 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-02-07 19:22:54,749 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-02-07 19:22:54,749 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-02-07 19:22:54,750 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:22:54" (1/1) ... [2024-02-07 19:22:54,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-07 19:22:54,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:22:54,811 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 19:22:54,818 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 19:22:54,854 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2024-02-07 19:22:54,854 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2024-02-07 19:22:54,854 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2024-02-07 19:22:54,854 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2024-02-07 19:22:54,855 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-02-07 19:22:54,855 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-02-07 19:22:54,855 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-02-07 19:22:54,855 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-02-07 19:22:54,856 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-02-07 19:22:54,856 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-02-07 19:22:54,856 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-02-07 19:22:54,856 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-02-07 19:22:54,856 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-02-07 19:22:54,857 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-02-07 19:22:54,857 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-02-07 19:22:54,858 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-02-07 19:22:54,860 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-02-07 19:22:54,860 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-02-07 19:22:54,860 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-02-07 19:22:54,860 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-02-07 19:22:54,861 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-02-07 19:22:54,861 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-02-07 19:22:54,861 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-02-07 19:22:54,861 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-02-07 19:22:54,861 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-02-07 19:22:54,862 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-02-07 19:22:54,864 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 19:22:55,014 INFO L244 CfgBuilder]: Building ICFG [2024-02-07 19:22:55,016 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-02-07 19:22:55,249 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-02-07 19:22:55,249 INFO L293 CfgBuilder]: Performing block encoding [2024-02-07 19:22:55,425 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-02-07 19:22:55,425 INFO L320 CfgBuilder]: Removed 2 assume(true) statements. [2024-02-07 19:22:55,426 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.02 07:22:55 BoogieIcfgContainer [2024-02-07 19:22:55,426 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-02-07 19:22:55,428 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-02-07 19:22:55,428 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-02-07 19:22:55,431 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-02-07 19:22:55,431 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.02 07:22:53" (1/4) ... [2024-02-07 19:22:55,432 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@578a72ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 07:22:55, skipping insertion in model container [2024-02-07 19:22:55,432 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 07:22:53" (2/4) ... [2024-02-07 19:22:55,433 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@578a72ad and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 07.02 07:22:55, skipping insertion in model container [2024-02-07 19:22:55,433 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:22:54" (3/4) ... [2024-02-07 19:22:55,433 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@578a72ad and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 07.02 07:22:55, skipping insertion in model container [2024-02-07 19:22:55,434 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.02 07:22:55" (4/4) ... [2024-02-07 19:22:55,435 INFO L112 eAbstractionObserver]: Analyzing ICFG stack_longer-1.i [2024-02-07 19:22:55,452 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-02-07 19:22:55,453 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2024-02-07 19:22:55,453 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-02-07 19:22:55,516 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-02-07 19:22:55,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 44 places, 42 transitions, 98 flow [2024-02-07 19:22:55,594 INFO L124 PetriNetUnfolderBase]: 5/40 cut-off events. [2024-02-07 19:22:55,594 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-02-07 19:22:55,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 40 events. 5/40 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 90 event pairs, 0 based on Foata normal form. 0/30 useless extension candidates. Maximal degree in co-relation 36. Up to 3 conditions per place. [2024-02-07 19:22:55,600 INFO L82 GeneralOperation]: Start removeDead. Operand has 44 places, 42 transitions, 98 flow [2024-02-07 19:22:55,605 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 40 places, 38 transitions, 85 flow [2024-02-07 19:22:55,620 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-07 19:22:55,629 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;@2ab64e4a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-07 19:22:55,630 INFO L358 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2024-02-07 19:22:55,641 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-07 19:22:55,641 INFO L124 PetriNetUnfolderBase]: 1/18 cut-off events. [2024-02-07 19:22:55,641 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-02-07 19:22:55,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:22:55,642 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:22:55,643 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 10 more)] === [2024-02-07 19:22:55,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:22:55,649 INFO L85 PathProgramCache]: Analyzing trace with hash 691448266, now seen corresponding path program 1 times [2024-02-07 19:22:55,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:22:55,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010370262] [2024-02-07 19:22:55,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:22:55,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:22:55,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:22:56,053 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 19:22:56,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:22:56,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010370262] [2024-02-07 19:22:56,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010370262] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:22:56,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:22:56,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-07 19:22:56,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775664379] [2024-02-07 19:22:56,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:22:56,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 19:22:56,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:22:56,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 19:22:56,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-07 19:22:56,108 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-02-07 19:22:56,110 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 38 transitions, 85 flow. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 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 19:22:56,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:22:56,112 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-02-07 19:22:56,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:22:56,308 INFO L124 PetriNetUnfolderBase]: 360/763 cut-off events. [2024-02-07 19:22:56,309 INFO L125 PetriNetUnfolderBase]: For 38/38 co-relation queries the response was YES. [2024-02-07 19:22:56,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1409 conditions, 763 events. 360/763 cut-off events. For 38/38 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 4004 event pairs, 82 based on Foata normal form. 46/722 useless extension candidates. Maximal degree in co-relation 1244. Up to 375 conditions per place. [2024-02-07 19:22:56,316 INFO L140 encePairwiseOnDemand]: 36/42 looper letters, 48 selfloop transitions, 3 changer transitions 0/64 dead transitions. [2024-02-07 19:22:56,317 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 64 transitions, 248 flow [2024-02-07 19:22:56,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-07 19:22:56,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-07 19:22:56,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 116 transitions. [2024-02-07 19:22:56,328 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6904761904761905 [2024-02-07 19:22:56,330 INFO L175 Difference]: Start difference. First operand has 40 places, 38 transitions, 85 flow. Second operand 4 states and 116 transitions. [2024-02-07 19:22:56,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 64 transitions, 248 flow [2024-02-07 19:22:56,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 64 transitions, 239 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-02-07 19:22:56,338 INFO L231 Difference]: Finished difference. Result has 42 places, 38 transitions, 96 flow [2024-02-07 19:22:56,339 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=96, PETRI_PLACES=42, PETRI_TRANSITIONS=38} [2024-02-07 19:22:56,344 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 2 predicate places. [2024-02-07 19:22:56,344 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 38 transitions, 96 flow [2024-02-07 19:22:56,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 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 19:22:56,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:22:56,345 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:22:56,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-02-07 19:22:56,346 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t2Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 10 more)] === [2024-02-07 19:22:56,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:22:56,347 INFO L85 PathProgramCache]: Analyzing trace with hash 572959966, now seen corresponding path program 1 times [2024-02-07 19:22:56,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:22:56,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932120415] [2024-02-07 19:22:56,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:22:56,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:22:56,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:22:56,471 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 19:22:56,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:22:56,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932120415] [2024-02-07 19:22:56,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932120415] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:22:56,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:22:56,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-02-07 19:22:56,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610992472] [2024-02-07 19:22:56,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:22:56,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 19:22:56,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:22:56,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 19:22:56,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 19:22:56,498 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-02-07 19:22:56,499 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 38 transitions, 96 flow. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 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 19:22:56,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:22:56,500 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-02-07 19:22:56,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:22:56,654 INFO L124 PetriNetUnfolderBase]: 441/856 cut-off events. [2024-02-07 19:22:56,654 INFO L125 PetriNetUnfolderBase]: For 57/57 co-relation queries the response was YES. [2024-02-07 19:22:56,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1749 conditions, 856 events. 441/856 cut-off events. For 57/57 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 4206 event pairs, 177 based on Foata normal form. 19/826 useless extension candidates. Maximal degree in co-relation 1352. Up to 559 conditions per place. [2024-02-07 19:22:56,663 INFO L140 encePairwiseOnDemand]: 38/42 looper letters, 37 selfloop transitions, 2 changer transitions 3/51 dead transitions. [2024-02-07 19:22:56,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 51 transitions, 209 flow [2024-02-07 19:22:56,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 19:22:56,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 19:22:56,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 77 transitions. [2024-02-07 19:22:56,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2024-02-07 19:22:56,672 INFO L175 Difference]: Start difference. First operand has 42 places, 38 transitions, 96 flow. Second operand 3 states and 77 transitions. [2024-02-07 19:22:56,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 51 transitions, 209 flow [2024-02-07 19:22:56,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 51 transitions, 207 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-07 19:22:56,679 INFO L231 Difference]: Finished difference. Result has 44 places, 39 transitions, 108 flow [2024-02-07 19:22:56,679 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=108, PETRI_PLACES=44, PETRI_TRANSITIONS=39} [2024-02-07 19:22:56,680 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 4 predicate places. [2024-02-07 19:22:56,680 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 39 transitions, 108 flow [2024-02-07 19:22:56,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 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 19:22:56,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:22:56,680 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:22:56,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-02-07 19:22:56,681 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t1Err1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 10 more)] === [2024-02-07 19:22:56,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:22:56,682 INFO L85 PathProgramCache]: Analyzing trace with hash -39938788, now seen corresponding path program 1 times [2024-02-07 19:22:56,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:22:56,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079457132] [2024-02-07 19:22:56,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:22:56,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:22:56,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:22:56,760 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 19:22:56,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:22:56,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079457132] [2024-02-07 19:22:56,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079457132] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:22:56,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:22:56,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-07 19:22:56,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850773022] [2024-02-07 19:22:56,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:22:56,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 19:22:56,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:22:56,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 19:22:56,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 19:22:56,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-02-07 19:22:56,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 39 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 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 19:22:56,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:22:56,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-02-07 19:22:56,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:22:56,880 INFO L124 PetriNetUnfolderBase]: 357/720 cut-off events. [2024-02-07 19:22:56,880 INFO L125 PetriNetUnfolderBase]: For 89/89 co-relation queries the response was YES. [2024-02-07 19:22:56,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1531 conditions, 720 events. 357/720 cut-off events. For 89/89 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 3312 event pairs, 137 based on Foata normal form. 72/749 useless extension candidates. Maximal degree in co-relation 1106. Up to 398 conditions per place. [2024-02-07 19:22:56,884 INFO L140 encePairwiseOnDemand]: 37/42 looper letters, 36 selfloop transitions, 1 changer transitions 3/48 dead transitions. [2024-02-07 19:22:56,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 48 transitions, 207 flow [2024-02-07 19:22:56,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 19:22:56,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 19:22:56,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 74 transitions. [2024-02-07 19:22:56,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5873015873015873 [2024-02-07 19:22:56,886 INFO L175 Difference]: Start difference. First operand has 44 places, 39 transitions, 108 flow. Second operand 3 states and 74 transitions. [2024-02-07 19:22:56,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 48 transitions, 207 flow [2024-02-07 19:22:56,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 48 transitions, 205 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-07 19:22:56,888 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 103 flow [2024-02-07 19:22:56,888 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=103, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2024-02-07 19:22:56,889 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 3 predicate places. [2024-02-07 19:22:56,889 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 103 flow [2024-02-07 19:22:56,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 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 19:22:56,890 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:22:56,890 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:22:56,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-02-07 19:22:56,890 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 10 more)] === [2024-02-07 19:22:56,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:22:56,891 INFO L85 PathProgramCache]: Analyzing trace with hash -1460132253, now seen corresponding path program 1 times [2024-02-07 19:22:56,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:22:56,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787280676] [2024-02-07 19:22:56,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:22:56,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:22:56,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:22:57,043 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:22:57,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:22:57,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787280676] [2024-02-07 19:22:57,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787280676] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 19:22:57,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598148130] [2024-02-07 19:22:57,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:22:57,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:22:57,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:22:57,048 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 19:22:57,067 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 19:22:57,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:22:57,172 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 7 conjunts are in the unsatisfiable core [2024-02-07 19:22:57,177 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 19:22:57,243 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-02-07 19:22:57,355 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:22:57,355 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 19:22:57,432 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:22:57,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598148130] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 19:22:57,433 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 19:22:57,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2024-02-07 19:22:57,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355142520] [2024-02-07 19:22:57,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 19:22:57,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-02-07 19:22:57,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:22:57,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-02-07 19:22:57,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-02-07 19:22:57,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-02-07 19:22:57,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 103 flow. Second operand has 10 states, 10 states have (on average 17.9) internal successors, (179), 10 states have internal predecessors, (179), 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 19:22:57,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:22:57,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-02-07 19:22:57,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:22:57,910 INFO L124 PetriNetUnfolderBase]: 1009/2134 cut-off events. [2024-02-07 19:22:57,911 INFO L125 PetriNetUnfolderBase]: For 240/240 co-relation queries the response was YES. [2024-02-07 19:22:57,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4350 conditions, 2134 events. 1009/2134 cut-off events. For 240/240 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 12011 event pairs, 83 based on Foata normal form. 0/2033 useless extension candidates. Maximal degree in co-relation 3754. Up to 408 conditions per place. [2024-02-07 19:22:57,922 INFO L140 encePairwiseOnDemand]: 37/42 looper letters, 142 selfloop transitions, 18 changer transitions 3/174 dead transitions. [2024-02-07 19:22:57,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 174 transitions, 762 flow [2024-02-07 19:22:57,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-02-07 19:22:57,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-02-07 19:22:57,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 347 transitions. [2024-02-07 19:22:57,928 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6884920634920635 [2024-02-07 19:22:57,928 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 103 flow. Second operand 12 states and 347 transitions. [2024-02-07 19:22:57,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 174 transitions, 762 flow [2024-02-07 19:22:57,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 174 transitions, 761 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-07 19:22:57,935 INFO L231 Difference]: Finished difference. Result has 58 places, 54 transitions, 249 flow [2024-02-07 19:22:57,935 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=249, PETRI_PLACES=58, PETRI_TRANSITIONS=54} [2024-02-07 19:22:57,936 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 18 predicate places. [2024-02-07 19:22:57,937 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 54 transitions, 249 flow [2024-02-07 19:22:57,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.9) internal successors, (179), 10 states have internal predecessors, (179), 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 19:22:57,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:22:57,937 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:22:57,953 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 19:22:58,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:22:58,151 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 10 more)] === [2024-02-07 19:22:58,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:22:58,152 INFO L85 PathProgramCache]: Analyzing trace with hash 109683331, now seen corresponding path program 1 times [2024-02-07 19:22:58,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:22:58,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640331074] [2024-02-07 19:22:58,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:22:58,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:22:58,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:22:58,247 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 19:22:58,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:22:58,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640331074] [2024-02-07 19:22:58,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640331074] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:22:58,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:22:58,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-07 19:22:58,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135959839] [2024-02-07 19:22:58,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:22:58,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 19:22:58,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:22:58,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 19:22:58,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 19:22:58,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-02-07 19:22:58,253 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 54 transitions, 249 flow. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 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 19:22:58,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:22:58,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-02-07 19:22:58,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:22:58,433 INFO L124 PetriNetUnfolderBase]: 593/1362 cut-off events. [2024-02-07 19:22:58,433 INFO L125 PetriNetUnfolderBase]: For 477/477 co-relation queries the response was YES. [2024-02-07 19:22:58,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2988 conditions, 1362 events. 593/1362 cut-off events. For 477/477 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 7022 event pairs, 198 based on Foata normal form. 60/1405 useless extension candidates. Maximal degree in co-relation 2860. Up to 607 conditions per place. [2024-02-07 19:22:58,442 INFO L140 encePairwiseOnDemand]: 38/42 looper letters, 44 selfloop transitions, 4 changer transitions 0/59 dead transitions. [2024-02-07 19:22:58,443 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 59 transitions, 327 flow [2024-02-07 19:22:58,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 19:22:58,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 19:22:58,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 81 transitions. [2024-02-07 19:22:58,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2024-02-07 19:22:58,444 INFO L175 Difference]: Start difference. First operand has 58 places, 54 transitions, 249 flow. Second operand 3 states and 81 transitions. [2024-02-07 19:22:58,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 59 transitions, 327 flow [2024-02-07 19:22:58,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 59 transitions, 303 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-02-07 19:22:58,453 INFO L231 Difference]: Finished difference. Result has 56 places, 48 transitions, 190 flow [2024-02-07 19:22:58,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=190, PETRI_PLACES=56, PETRI_TRANSITIONS=48} [2024-02-07 19:22:58,455 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 16 predicate places. [2024-02-07 19:22:58,455 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 48 transitions, 190 flow [2024-02-07 19:22:58,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 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 19:22:58,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:22:58,455 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:22:58,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-02-07 19:22:58,456 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t2Err2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 10 more)] === [2024-02-07 19:22:58,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:22:58,457 INFO L85 PathProgramCache]: Analyzing trace with hash -1597500184, now seen corresponding path program 1 times [2024-02-07 19:22:58,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:22:58,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008340107] [2024-02-07 19:22:58,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:22:58,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:22:58,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:22:58,965 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 19:22:58,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:22:58,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008340107] [2024-02-07 19:22:58,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008340107] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:22:58,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:22:58,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-02-07 19:22:58,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001193889] [2024-02-07 19:22:58,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:22:58,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-07 19:22:58,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:22:58,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-07 19:22:58,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-02-07 19:22:58,972 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-02-07 19:22:58,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 48 transitions, 190 flow. Second operand has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 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 19:22:58,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:22:58,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-02-07 19:22:58,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:22:59,204 INFO L124 PetriNetUnfolderBase]: 651/1474 cut-off events. [2024-02-07 19:22:59,205 INFO L125 PetriNetUnfolderBase]: For 509/509 co-relation queries the response was YES. [2024-02-07 19:22:59,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3312 conditions, 1474 events. 651/1474 cut-off events. For 509/509 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 7856 event pairs, 162 based on Foata normal form. 0/1451 useless extension candidates. Maximal degree in co-relation 2903. Up to 878 conditions per place. [2024-02-07 19:22:59,213 INFO L140 encePairwiseOnDemand]: 37/42 looper letters, 62 selfloop transitions, 5 changer transitions 3/81 dead transitions. [2024-02-07 19:22:59,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 81 transitions, 422 flow [2024-02-07 19:22:59,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-07 19:22:59,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-07 19:22:59,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 134 transitions. [2024-02-07 19:22:59,215 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.638095238095238 [2024-02-07 19:22:59,215 INFO L175 Difference]: Start difference. First operand has 56 places, 48 transitions, 190 flow. Second operand 5 states and 134 transitions. [2024-02-07 19:22:59,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 81 transitions, 422 flow [2024-02-07 19:22:59,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 81 transitions, 412 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-07 19:22:59,221 INFO L231 Difference]: Finished difference. Result has 61 places, 51 transitions, 222 flow [2024-02-07 19:22:59,222 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=222, PETRI_PLACES=61, PETRI_TRANSITIONS=51} [2024-02-07 19:22:59,224 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 21 predicate places. [2024-02-07 19:22:59,225 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 51 transitions, 222 flow [2024-02-07 19:22:59,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 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 19:22:59,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:22:59,225 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:22:59,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-02-07 19:22:59,225 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 10 more)] === [2024-02-07 19:22:59,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:22:59,226 INFO L85 PathProgramCache]: Analyzing trace with hash 636874789, now seen corresponding path program 1 times [2024-02-07 19:22:59,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:22:59,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704203978] [2024-02-07 19:22:59,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:22:59,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:22:59,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:22:59,765 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:22:59,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:22:59,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704203978] [2024-02-07 19:22:59,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704203978] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 19:22:59,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264278075] [2024-02-07 19:22:59,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:22:59,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:22:59,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:22:59,767 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 19:22:59,770 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 19:22:59,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:22:59,890 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 13 conjunts are in the unsatisfiable core [2024-02-07 19:22:59,895 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 19:22:59,916 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-02-07 19:22:59,963 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-02-07 19:23:00,062 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 32 [2024-02-07 19:23:00,104 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:23:00,104 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 19:23:00,505 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2024-02-07 19:23:00,561 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:23:00,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264278075] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 19:23:00,562 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 19:23:00,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 13 [2024-02-07 19:23:00,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275158915] [2024-02-07 19:23:00,563 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 19:23:00,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-02-07 19:23:00,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:23:00,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-02-07 19:23:00,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2024-02-07 19:23:00,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-02-07 19:23:00,565 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 51 transitions, 222 flow. Second operand has 14 states, 14 states have (on average 18.357142857142858) internal successors, (257), 14 states have internal predecessors, (257), 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 19:23:00,565 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:23:00,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-02-07 19:23:00,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:23:01,356 INFO L124 PetriNetUnfolderBase]: 1198/2725 cut-off events. [2024-02-07 19:23:01,356 INFO L125 PetriNetUnfolderBase]: For 1276/1276 co-relation queries the response was YES. [2024-02-07 19:23:01,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6056 conditions, 2725 events. 1198/2725 cut-off events. For 1276/1276 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 16112 event pairs, 258 based on Foata normal form. 0/2689 useless extension candidates. Maximal degree in co-relation 4886. Up to 415 conditions per place. [2024-02-07 19:23:01,371 INFO L140 encePairwiseOnDemand]: 37/42 looper letters, 142 selfloop transitions, 27 changer transitions 0/180 dead transitions. [2024-02-07 19:23:01,371 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 180 transitions, 981 flow [2024-02-07 19:23:01,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-02-07 19:23:01,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-02-07 19:23:01,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 335 transitions. [2024-02-07 19:23:01,374 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6646825396825397 [2024-02-07 19:23:01,374 INFO L175 Difference]: Start difference. First operand has 61 places, 51 transitions, 222 flow. Second operand 12 states and 335 transitions. [2024-02-07 19:23:01,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 180 transitions, 981 flow [2024-02-07 19:23:01,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 180 transitions, 976 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-07 19:23:01,382 INFO L231 Difference]: Finished difference. Result has 73 places, 69 transitions, 388 flow [2024-02-07 19:23:01,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=217, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=388, PETRI_PLACES=73, PETRI_TRANSITIONS=69} [2024-02-07 19:23:01,383 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 33 predicate places. [2024-02-07 19:23:01,383 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 69 transitions, 388 flow [2024-02-07 19:23:01,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 18.357142857142858) internal successors, (257), 14 states have internal predecessors, (257), 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 19:23:01,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:23:01,384 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:23:01,400 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 19:23:01,598 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,SelfDestructingSolverStorable6 [2024-02-07 19:23:01,599 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 10 more)] === [2024-02-07 19:23:01,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:23:01,599 INFO L85 PathProgramCache]: Analyzing trace with hash -681514876, now seen corresponding path program 1 times [2024-02-07 19:23:01,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:23:01,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986926503] [2024-02-07 19:23:01,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:23:01,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:23:01,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-07 19:23:01,639 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-02-07 19:23:01,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-07 19:23:01,716 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-02-07 19:23:01,717 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-02-07 19:23:01,718 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location t2Err2ASSERT_VIOLATIONERROR_FUNCTION (11 of 12 remaining) [2024-02-07 19:23:01,719 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (10 of 12 remaining) [2024-02-07 19:23:01,720 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (9 of 12 remaining) [2024-02-07 19:23:01,720 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (8 of 12 remaining) [2024-02-07 19:23:01,720 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (7 of 12 remaining) [2024-02-07 19:23:01,720 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (6 of 12 remaining) [2024-02-07 19:23:01,721 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err1ASSERT_VIOLATIONWITNESS_INVARIANT (5 of 12 remaining) [2024-02-07 19:23:01,721 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err2ASSERT_VIOLATIONERROR_FUNCTION (4 of 12 remaining) [2024-02-07 19:23:01,721 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 12 remaining) [2024-02-07 19:23:01,721 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 12 remaining) [2024-02-07 19:23:01,722 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (1 of 12 remaining) [2024-02-07 19:23:01,722 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err1ASSERT_VIOLATIONWITNESS_INVARIANT (0 of 12 remaining) [2024-02-07 19:23:01,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-02-07 19:23:01,722 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:23:01,728 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-02-07 19:23:01,728 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-02-07 19:23:01,786 INFO L503 ceAbstractionStarter]: Automizer considered 3 witness invariants [2024-02-07 19:23:01,787 INFO L504 ceAbstractionStarter]: WitnessConsidered=3 [2024-02-07 19:23:01,789 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.02 07:23:01 BasicIcfg [2024-02-07 19:23:01,789 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-02-07 19:23:01,790 INFO L158 Benchmark]: Toolchain (without parser) took 7991.39ms. Allocated memory was 155.2MB in the beginning and 302.0MB in the end (delta: 146.8MB). Free memory was 118.1MB in the beginning and 204.8MB in the end (delta: -86.7MB). Peak memory consumption was 60.0MB. Max. memory is 16.1GB. [2024-02-07 19:23:01,790 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 109.1MB. Free memory is still 79.7MB. There was no memory consumed. Max. memory is 16.1GB. [2024-02-07 19:23:01,790 INFO L158 Benchmark]: Witness Parser took 1.54ms. Allocated memory is still 155.2MB. Free memory is still 120.2MB. There was no memory consumed. Max. memory is 16.1GB. [2024-02-07 19:23:01,791 INFO L158 Benchmark]: CACSL2BoogieTranslator took 785.91ms. Allocated memory is still 155.2MB. Free memory was 118.1MB in the beginning and 83.5MB in the end (delta: 34.6MB). Peak memory consumption was 33.6MB. Max. memory is 16.1GB. [2024-02-07 19:23:01,791 INFO L158 Benchmark]: Boogie Procedure Inliner took 75.00ms. Allocated memory is still 155.2MB. Free memory was 83.5MB in the beginning and 81.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-02-07 19:23:01,791 INFO L158 Benchmark]: Boogie Preprocessor took 86.43ms. Allocated memory is still 155.2MB. Free memory was 81.4MB in the beginning and 124.0MB in the end (delta: -42.5MB). Peak memory consumption was 10.8MB. Max. memory is 16.1GB. [2024-02-07 19:23:01,792 INFO L158 Benchmark]: RCFGBuilder took 677.36ms. Allocated memory is still 155.2MB. Free memory was 124.0MB in the beginning and 77.8MB in the end (delta: 46.1MB). Peak memory consumption was 46.1MB. Max. memory is 16.1GB. [2024-02-07 19:23:01,793 INFO L158 Benchmark]: TraceAbstraction took 6361.38ms. Allocated memory was 155.2MB in the beginning and 302.0MB in the end (delta: 146.8MB). Free memory was 76.8MB in the beginning and 204.8MB in the end (delta: -128.0MB). Peak memory consumption was 21.9MB. Max. memory is 16.1GB. [2024-02-07 19:23:01,797 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 109.1MB. Free memory is still 79.7MB. There was no memory consumed. Max. memory is 16.1GB. * Witness Parser took 1.54ms. Allocated memory is still 155.2MB. Free memory is still 120.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 785.91ms. Allocated memory is still 155.2MB. Free memory was 118.1MB in the beginning and 83.5MB in the end (delta: 34.6MB). Peak memory consumption was 33.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 75.00ms. Allocated memory is still 155.2MB. Free memory was 83.5MB in the beginning and 81.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 86.43ms. Allocated memory is still 155.2MB. Free memory was 81.4MB in the beginning and 124.0MB in the end (delta: -42.5MB). Peak memory consumption was 10.8MB. Max. memory is 16.1GB. * RCFGBuilder took 677.36ms. Allocated memory is still 155.2MB. Free memory was 124.0MB in the beginning and 77.8MB in the end (delta: 46.1MB). Peak memory consumption was 46.1MB. Max. memory is 16.1GB. * TraceAbstraction took 6361.38ms. Allocated memory was 155.2MB in the beginning and 302.0MB in the end (delta: 146.8MB). Free memory was 76.8MB in the beginning and 204.8MB in the end (delta: -128.0MB). Peak memory consumption was 21.9MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 940]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L935] 0 static int top=0; [L936] 0 static unsigned int arr[(400)]; [L936] 0 static unsigned int arr[(400)]; [L937] 0 pthread_mutex_t m; [L937] 0 pthread_mutex_t m; [L937] 0 pthread_mutex_t m; [L937] 0 pthread_mutex_t m; [L937] 0 pthread_mutex_t m; [L937] 0 pthread_mutex_t m; [L938] 0 _Bool flag=(0); [L1019] 0 pthread_t id1, id2; [L1021] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [arr={3:0}, flag=0, id1={6:0}, id2={5:0}, m={4:0}, top=0] [L988] 1 int i; [L989] 1 unsigned int tmp; [L990] 1 i=0 VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=0, i=0, m={4:0}, top=0] [L990] COND TRUE 1 i<(400) VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=0, i=0, m={4:0}, top=0] [L1022] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [arr={3:0}, flag=0, id1={6:0}, id2={5:0}, m={4:0}, top=0] [L1004] 2 int i; [L1005] 2 i=0 VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=0, i=0, m={4:0}, top=0] [L1005] COND TRUE 2 i<(400) VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=0, i=0, m={4:0}, top=0] [L993] 1 tmp = __VERIFIER_nondet_uint() [L994] CALL 1 assume_abort_if_not(tmp < (400)) [L23] COND FALSE 1 !(!cond) [L994] RET 1 assume_abort_if_not(tmp < (400)) [L995] CALL, EXPR 1 push(arr,tmp) [L960] COND FALSE 1 !(top==(400)) [L967] CALL, EXPR 1 get_top() [L952] 1 return top; [L967] RET, EXPR 1 get_top() [L967] 1 stack[get_top()] = x [L968] CALL 1 inc_top() [L944] 1 top++ [L968] RET 1 inc_top() [L970] 1 return 0; [L995] RET, EXPR 1 push(arr,tmp) [L995] COND FALSE 1 !(push(arr,tmp)==(-1)) [L997] 1 flag=(1) VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=0, m={4:0}, tmp=0, top=1] [L998] 1 CodeAnnotStmt[Assertion[BinaryExpression[COMPEQ,IdentifierExpression[flag],CastExpression[ACSLType[_Bool],IntegerLiteral[1]]]]] VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=0, m={4:0}, tmp=0, top=1] [L1008] 2 CodeAnnotStmt[Assertion[BinaryExpression[LOGICOR,BinaryExpression[COMPEQ,IdentifierExpression[flag],CastExpression[ACSLType[_Bool],IntegerLiteral[0]]],BinaryExpression[COMPEQ,IdentifierExpression[flag],CastExpression[ACSLType[_Bool],IntegerLiteral[1]]]]]] VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=0, m={4:0}, top=1] [L1008] COND TRUE 2 \read(flag) [L1010] CALL, EXPR 2 pop(arr) [L974] CALL, EXPR 2 get_top() [L952] 2 return top; [L974] RET, EXPR 2 get_top() [L974] COND FALSE 2 !(get_top()==0) [L981] CALL 2 dec_top() [L948] 2 top-- [L981] RET 2 dec_top() [L982] CALL, EXPR 2 get_top() [L952] 2 return top; [L982] RET, EXPR 2 get_top() [L982] EXPR 2 stack[get_top()] [L982] 2 return stack[get_top()]; [L1010] RET, EXPR 2 pop(arr) [L1010] COND FALSE 2 !(!(pop(arr)!=(-2))) [L1005] 2 i++ VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=1, m={4:0}, top=0] [L1005] COND TRUE 2 i<(400) VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=1, m={4:0}, top=0] [L1008] 2 CodeAnnotStmt[Assertion[BinaryExpression[LOGICOR,BinaryExpression[COMPEQ,IdentifierExpression[flag],CastExpression[ACSLType[_Bool],IntegerLiteral[0]]],BinaryExpression[COMPEQ,IdentifierExpression[flag],CastExpression[ACSLType[_Bool],IntegerLiteral[1]]]]]] VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=1, m={4:0}, top=0] [L1008] COND TRUE 2 \read(flag) [L1010] CALL, EXPR 2 pop(arr) [L974] CALL, EXPR 2 get_top() [L952] 2 return top; [L974] RET, EXPR 2 get_top() [L974] COND TRUE 2 get_top()==0 [L977] 2 return (-2); [L1010] RET, EXPR 2 pop(arr) [L1010] COND TRUE 2 !(pop(arr)!=(-2)) [L1011] 2 CodeAnnotStmt[Assertion[BinaryExpression[COMPEQ,IdentifierExpression[flag],CastExpression[ACSLType[_Bool],IntegerLiteral[1]]]]] [L1011] CALL 2 error() [L940] 2 reach_error() VAL [arr={3:0}, flag=1, m={4:0}, top=0] - UnprovableResult [Line: 1022]: Unable to prove that petrification did provide enough thread instances (tool internal message) Unable to prove that petrification did provide enough thread instances (tool internal message) Reason: Not analyzed. - UnprovableResult [Line: 1021]: Unable to prove that petrification did provide enough thread instances (tool internal message) Unable to prove that petrification did provide enough thread instances (tool internal message) Reason: Not analyzed. - UnprovableResult [Line: 940]: Unable to prove that a call to reach_error is unreachable Unable to prove that a call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 998]: Unable to prove that invariant of correctness witness holds Unable to prove that invariant of correctness witness holds Reason: Not analyzed. - UnprovableResult [Line: 1008]: Unable to prove that invariant of correctness witness holds Unable to prove that invariant of correctness witness holds Reason: Not analyzed. - UnprovableResult [Line: 1011]: Unable to prove that invariant of correctness witness holds Unable to prove that invariant of correctness witness holds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 68 locations, 12 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 6.2s, OverallIterations: 8, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 2.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 578 SdHoareTripleChecker+Valid, 1.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 553 mSDsluCounter, 10 SdHoareTripleChecker+Invalid, 0.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 35 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1142 IncrementalHoareTripleChecker+Invalid, 1177 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 35 mSolverCounterUnsat, 10 mSDtfsCounter, 1142 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 118 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=388occurred in iteration=7, InterpolantAutomatonStates: 42, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.5s InterpolantComputationTime, 185 NumberOfCodeBlocks, 185 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 190 ConstructedInterpolants, 8 QuantifiedInterpolants, 2105 SizeOfPredicates, 21 NumberOfNonLiveVariables, 354 ConjunctsInSsa, 20 ConjunctsInUnsatCore, 11 InterpolantComputations, 5 PerfectInterpolantSequences, 0/33 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2024-02-07 19:23:01,827 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE