./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 958ec4d9 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/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-dev-958ec4d-m [2024-02-07 14:44:01,043 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-02-07 14:44:01,102 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-02-07 14:44:01,109 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-02-07 14:44:01,109 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-02-07 14:44:01,149 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-02-07 14:44:01,154 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-02-07 14:44:01,154 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-02-07 14:44:01,155 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-02-07 14:44:01,158 INFO L153 SettingsManager]: * Use memory slicer=true [2024-02-07 14:44:01,158 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-02-07 14:44:01,158 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-02-07 14:44:01,159 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-02-07 14:44:01,160 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-02-07 14:44:01,160 INFO L153 SettingsManager]: * Use SBE=true [2024-02-07 14:44:01,160 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-02-07 14:44:01,160 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-02-07 14:44:01,161 INFO L153 SettingsManager]: * sizeof long=4 [2024-02-07 14:44:01,161 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-02-07 14:44:01,161 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-02-07 14:44:01,161 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-02-07 14:44:01,162 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-02-07 14:44:01,162 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-02-07 14:44:01,162 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-02-07 14:44:01,173 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-02-07 14:44:01,173 INFO L153 SettingsManager]: * sizeof long double=12 [2024-02-07 14:44:01,173 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-02-07 14:44:01,174 INFO L153 SettingsManager]: * Use constant arrays=true [2024-02-07 14:44:01,174 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-02-07 14:44:01,175 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-02-07 14:44:01,175 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-02-07 14:44:01,175 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-02-07 14:44:01,176 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-07 14:44:01,176 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-02-07 14:44:01,176 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-02-07 14:44:01,176 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-02-07 14:44:01,176 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-02-07 14:44:01,176 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-02-07 14:44:01,177 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-02-07 14:44:01,177 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-02-07 14:44:01,177 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-02-07 14:44:01,177 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-02-07 14:44:01,177 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-02-07 14:44:01,178 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-02-07 14:44:01,379 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-02-07 14:44:01,401 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-02-07 14:44:01,403 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-02-07 14:44:01,404 INFO L270 PluginConnector]: Initializing CDTParser... [2024-02-07 14:44:01,405 INFO L274 PluginConnector]: CDTParser initialized [2024-02-07 14:44:01,405 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/stack_longer-1.i [2024-02-07 14:44:02,486 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-02-07 14:44:02,690 INFO L384 CDTParser]: Found 1 translation units. [2024-02-07 14:44:02,691 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack_longer-1.i [2024-02-07 14:44:02,706 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/636e05feb/38d27ed1dc5c49818b635a6262d753f6/FLAG22ac936e8 [2024-02-07 14:44:02,723 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/636e05feb/38d27ed1dc5c49818b635a6262d753f6 [2024-02-07 14:44:02,725 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-02-07 14:44:02,739 INFO L274 PluginConnector]: Witness Parser initialized [2024-02-07 14:44:02,741 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-02-07_10-47-16.files/SV-COMP24_unreach-call/stack_longer-1.yml/witness.yml [2024-02-07 14:44:02,855 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-02-07 14:44:02,856 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-02-07 14:44:02,873 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-02-07 14:44:02,873 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-02-07 14:44:02,877 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-02-07 14:44:02,877 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 02:44:02" (1/2) ... [2024-02-07 14:44:02,878 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@395c29ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:44:02, skipping insertion in model container [2024-02-07 14:44:02,878 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 02:44:02" (1/2) ... [2024-02-07 14:44:02,880 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@332b7db2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:44:02, skipping insertion in model container [2024-02-07 14:44:02,880 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 02:44:02" (2/2) ... [2024-02-07 14:44:02,880 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@395c29ca and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:44:02, skipping insertion in model container [2024-02-07 14:44:02,880 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 02:44:02" (2/2) ... [2024-02-07 14:44:02,880 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-02-07 14:44:02,922 INFO L74 edCorrectnessWitness]: Found the following entries in the witness: [2024-02-07 14:44:02,923 INFO L76 edCorrectnessWitness]: Location invariant before [L998-L998] flag == (_Bool)1 [2024-02-07 14:44:02,923 INFO L76 edCorrectnessWitness]: Location invariant before [L1011-L1011] flag == (_Bool)1 [2024-02-07 14:44:02,923 INFO L76 edCorrectnessWitness]: Location invariant before [L1008-L1008] flag == (_Bool)0 || flag == (_Bool)1 [2024-02-07 14:44:02,994 INFO L178 MainTranslator]: Built tables and reachable declarations [2024-02-07 14:44:03,545 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 14:44:03,596 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-02-07 14:44:03,607 INFO L203 MainTranslator]: Completed pre-run [2024-02-07 14:44:03,663 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 14:44:03,705 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-02-07 14:44:03,764 INFO L207 MainTranslator]: Completed translation [2024-02-07 14:44:03,765 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:44:03 WrapperNode [2024-02-07 14:44:03,765 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-02-07 14:44:03,765 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-02-07 14:44:03,766 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-02-07 14:44:03,766 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-02-07 14:44:03,771 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 02:44:03" (1/1) ... [2024-02-07 14:44:03,806 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 02:44:03" (1/1) ... [2024-02-07 14:44:03,832 INFO L138 Inliner]: procedures = 278, calls = 41, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 166 [2024-02-07 14:44:03,833 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-02-07 14:44:03,834 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-02-07 14:44:03,834 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-02-07 14:44:03,834 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-02-07 14:44:03,842 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 02:44:03" (1/1) ... [2024-02-07 14:44:03,843 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 02:44:03" (1/1) ... [2024-02-07 14:44:03,857 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 02:44:03" (1/1) ... [2024-02-07 14:44:03,871 INFO L175 MemorySlicer]: Split 14 memory accesses to 5 slices as follows [2, 5, 3, 2, 2]. 36 percent of accesses are in the largest equivalence class. The 7 initializations are split as follows [2, 5, 0, 0, 0]. The 4 writes are split as follows [0, 0, 2, 1, 1]. [2024-02-07 14:44:03,877 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 02:44:03" (1/1) ... [2024-02-07 14:44:03,877 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 02:44:03" (1/1) ... [2024-02-07 14:44:03,885 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 02:44:03" (1/1) ... [2024-02-07 14:44:03,889 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 02:44:03" (1/1) ... [2024-02-07 14:44:03,891 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 02:44:03" (1/1) ... [2024-02-07 14:44:03,892 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 02:44:03" (1/1) ... [2024-02-07 14:44:03,938 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-02-07 14:44:03,939 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-02-07 14:44:03,939 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-02-07 14:44:03,940 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-02-07 14:44:03,940 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 02:44:03" (1/1) ... [2024-02-07 14:44:03,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-07 14:44:03,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:44:03,965 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-02-07 14:44:04,005 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-02-07 14:44:04,017 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2024-02-07 14:44:04,017 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2024-02-07 14:44:04,017 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2024-02-07 14:44:04,017 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2024-02-07 14:44:04,017 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-02-07 14:44:04,018 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-02-07 14:44:04,018 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-02-07 14:44:04,018 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-02-07 14:44:04,018 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-02-07 14:44:04,018 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-02-07 14:44:04,018 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-02-07 14:44:04,019 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-02-07 14:44:04,019 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-02-07 14:44:04,019 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-02-07 14:44:04,020 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-02-07 14:44:04,020 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-02-07 14:44:04,020 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-02-07 14:44:04,020 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-02-07 14:44:04,020 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-02-07 14:44:04,020 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-02-07 14:44:04,020 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-02-07 14:44:04,021 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-02-07 14:44:04,021 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-02-07 14:44:04,021 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-02-07 14:44:04,021 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-02-07 14:44:04,021 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-02-07 14:44:04,022 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-02-07 14:44:04,142 INFO L244 CfgBuilder]: Building ICFG [2024-02-07 14:44:04,143 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-02-07 14:44:04,374 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-02-07 14:44:04,375 INFO L293 CfgBuilder]: Performing block encoding [2024-02-07 14:44:04,563 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-02-07 14:44:04,563 INFO L320 CfgBuilder]: Removed 2 assume(true) statements. [2024-02-07 14:44:04,565 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.02 02:44:04 BoogieIcfgContainer [2024-02-07 14:44:04,565 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-02-07 14:44:04,567 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-02-07 14:44:04,568 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-02-07 14:44:04,571 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-02-07 14:44:04,571 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.02 02:44:02" (1/4) ... [2024-02-07 14:44:04,572 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a6c2615 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 02:44:04, skipping insertion in model container [2024-02-07 14:44:04,572 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 02:44:02" (2/4) ... [2024-02-07 14:44:04,573 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a6c2615 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 07.02 02:44:04, skipping insertion in model container [2024-02-07 14:44:04,573 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 02:44:03" (3/4) ... [2024-02-07 14:44:04,573 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a6c2615 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 07.02 02:44:04, skipping insertion in model container [2024-02-07 14:44:04,573 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.02 02:44:04" (4/4) ... [2024-02-07 14:44:04,574 INFO L112 eAbstractionObserver]: Analyzing ICFG stack_longer-1.i [2024-02-07 14:44:04,589 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-02-07 14:44:04,590 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2024-02-07 14:44:04,590 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-02-07 14:44:04,640 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-02-07 14:44:04,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 44 places, 42 transitions, 98 flow [2024-02-07 14:44:04,690 INFO L124 PetriNetUnfolderBase]: 5/40 cut-off events. [2024-02-07 14:44:04,690 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-02-07 14:44:04,693 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 14:44:04,693 INFO L82 GeneralOperation]: Start removeDead. Operand has 44 places, 42 transitions, 98 flow [2024-02-07 14:44:04,696 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 40 places, 38 transitions, 85 flow [2024-02-07 14:44:04,702 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-07 14:44:04,708 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;@6257b490, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-07 14:44:04,708 INFO L358 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2024-02-07 14:44:04,714 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-07 14:44:04,715 INFO L124 PetriNetUnfolderBase]: 1/18 cut-off events. [2024-02-07 14:44:04,715 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-02-07 14:44:04,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:44:04,716 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:44:04,716 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 14:44:04,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:44:04,720 INFO L85 PathProgramCache]: Analyzing trace with hash 691448266, now seen corresponding path program 1 times [2024-02-07 14:44:04,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:44:04,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650452078] [2024-02-07 14:44:04,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:44:04,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:44:04,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:44:05,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:44:05,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:44:05,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650452078] [2024-02-07 14:44:05,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650452078] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:44:05,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:44:05,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-07 14:44:05,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280666366] [2024-02-07 14:44:05,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:44:05,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 14:44:05,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:44:05,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 14:44:05,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-07 14:44:05,076 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-02-07 14:44:05,078 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 14:44:05,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:44:05,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-02-07 14:44:05,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:44:05,313 INFO L124 PetriNetUnfolderBase]: 360/763 cut-off events. [2024-02-07 14:44:05,314 INFO L125 PetriNetUnfolderBase]: For 38/38 co-relation queries the response was YES. [2024-02-07 14:44:05,316 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 14:44:05,321 INFO L140 encePairwiseOnDemand]: 36/42 looper letters, 48 selfloop transitions, 3 changer transitions 0/64 dead transitions. [2024-02-07 14:44:05,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 64 transitions, 248 flow [2024-02-07 14:44:05,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-07 14:44:05,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-07 14:44:05,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 116 transitions. [2024-02-07 14:44:05,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6904761904761905 [2024-02-07 14:44:05,332 INFO L175 Difference]: Start difference. First operand has 40 places, 38 transitions, 85 flow. Second operand 4 states and 116 transitions. [2024-02-07 14:44:05,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 64 transitions, 248 flow [2024-02-07 14:44:05,335 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 14:44:05,337 INFO L231 Difference]: Finished difference. Result has 42 places, 38 transitions, 96 flow [2024-02-07 14:44:05,338 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 14:44:05,341 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 2 predicate places. [2024-02-07 14:44:05,341 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 38 transitions, 96 flow [2024-02-07 14:44:05,341 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 14:44:05,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:44:05,342 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:44:05,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-02-07 14:44:05,342 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 14:44:05,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:44:05,343 INFO L85 PathProgramCache]: Analyzing trace with hash 572959966, now seen corresponding path program 1 times [2024-02-07 14:44:05,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:44:05,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895360552] [2024-02-07 14:44:05,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:44:05,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:44:05,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:44:05,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:44:05,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:44:05,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895360552] [2024-02-07 14:44:05,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895360552] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:44:05,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:44:05,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-02-07 14:44:05,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510879880] [2024-02-07 14:44:05,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:44:05,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 14:44:05,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:44:05,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 14:44:05,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 14:44:05,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-02-07 14:44:05,426 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 14:44:05,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:44:05,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-02-07 14:44:05,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:44:05,543 INFO L124 PetriNetUnfolderBase]: 441/856 cut-off events. [2024-02-07 14:44:05,543 INFO L125 PetriNetUnfolderBase]: For 57/57 co-relation queries the response was YES. [2024-02-07 14:44:05,545 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 14:44:05,548 INFO L140 encePairwiseOnDemand]: 38/42 looper letters, 37 selfloop transitions, 2 changer transitions 3/51 dead transitions. [2024-02-07 14:44:05,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 51 transitions, 209 flow [2024-02-07 14:44:05,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 14:44:05,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 14:44:05,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 77 transitions. [2024-02-07 14:44:05,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2024-02-07 14:44:05,550 INFO L175 Difference]: Start difference. First operand has 42 places, 38 transitions, 96 flow. Second operand 3 states and 77 transitions. [2024-02-07 14:44:05,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 51 transitions, 209 flow [2024-02-07 14:44:05,551 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 14:44:05,552 INFO L231 Difference]: Finished difference. Result has 44 places, 39 transitions, 108 flow [2024-02-07 14:44:05,552 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 14:44:05,553 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 4 predicate places. [2024-02-07 14:44:05,553 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 39 transitions, 108 flow [2024-02-07 14:44:05,553 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 14:44:05,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:44:05,553 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:44:05,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-02-07 14:44:05,554 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 14:44:05,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:44:05,554 INFO L85 PathProgramCache]: Analyzing trace with hash -39938788, now seen corresponding path program 1 times [2024-02-07 14:44:05,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:44:05,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956915694] [2024-02-07 14:44:05,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:44:05,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:44:05,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:44:05,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:44:05,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:44:05,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956915694] [2024-02-07 14:44:05,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956915694] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:44:05,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:44:05,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-07 14:44:05,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990234768] [2024-02-07 14:44:05,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:44:05,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 14:44:05,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:44:05,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 14:44:05,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 14:44:05,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-02-07 14:44:05,666 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 14:44:05,666 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:44:05,666 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-02-07 14:44:05,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:44:05,751 INFO L124 PetriNetUnfolderBase]: 357/720 cut-off events. [2024-02-07 14:44:05,751 INFO L125 PetriNetUnfolderBase]: For 89/89 co-relation queries the response was YES. [2024-02-07 14:44:05,752 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 14:44:05,754 INFO L140 encePairwiseOnDemand]: 37/42 looper letters, 36 selfloop transitions, 1 changer transitions 3/48 dead transitions. [2024-02-07 14:44:05,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 48 transitions, 207 flow [2024-02-07 14:44:05,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 14:44:05,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 14:44:05,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 74 transitions. [2024-02-07 14:44:05,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5873015873015873 [2024-02-07 14:44:05,756 INFO L175 Difference]: Start difference. First operand has 44 places, 39 transitions, 108 flow. Second operand 3 states and 74 transitions. [2024-02-07 14:44:05,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 48 transitions, 207 flow [2024-02-07 14:44:05,757 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 14:44:05,757 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 103 flow [2024-02-07 14:44:05,758 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 14:44:05,758 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 3 predicate places. [2024-02-07 14:44:05,758 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 103 flow [2024-02-07 14:44:05,759 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 14:44:05,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:44:05,759 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:44:05,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-02-07 14:44:05,759 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 14:44:05,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:44:05,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1460132253, now seen corresponding path program 1 times [2024-02-07 14:44:05,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:44:05,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592367510] [2024-02-07 14:44:05,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:44:05,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:44:05,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:44:05,907 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 14:44:05,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:44:05,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592367510] [2024-02-07 14:44:05,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592367510] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:44:05,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480104926] [2024-02-07 14:44:05,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:44:05,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:44:05,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:44:05,910 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 14:44:05,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-02-07 14:44:06,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:44:06,015 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 5 conjunts are in the unsatisfiable core [2024-02-07 14:44:06,019 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:44:06,086 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 14:44:06,148 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 14:44:06,149 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:44:06,197 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 14:44:06,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480104926] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:44:06,197 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:44:06,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-02-07 14:44:06,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320611718] [2024-02-07 14:44:06,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:44:06,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-02-07 14:44:06,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:44:06,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-02-07 14:44:06,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-02-07 14:44:06,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-02-07 14:44:06,200 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 103 flow. Second operand has 8 states, 8 states have (on average 18.25) internal successors, (146), 8 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:44:06,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:44:06,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-02-07 14:44:06,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:44:06,643 INFO L124 PetriNetUnfolderBase]: 1005/2132 cut-off events. [2024-02-07 14:44:06,644 INFO L125 PetriNetUnfolderBase]: For 240/240 co-relation queries the response was YES. [2024-02-07 14:44:06,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4344 conditions, 2132 events. 1005/2132 cut-off events. For 240/240 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 12026 event pairs, 83 based on Foata normal form. 0/2031 useless extension candidates. Maximal degree in co-relation 3748. Up to 408 conditions per place. [2024-02-07 14:44:06,658 INFO L140 encePairwiseOnDemand]: 37/42 looper letters, 142 selfloop transitions, 18 changer transitions 3/174 dead transitions. [2024-02-07 14:44:06,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 174 transitions, 762 flow [2024-02-07 14:44:06,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-02-07 14:44:06,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-02-07 14:44:06,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 347 transitions. [2024-02-07 14:44:06,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6884920634920635 [2024-02-07 14:44:06,664 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 103 flow. Second operand 12 states and 347 transitions. [2024-02-07 14:44:06,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 174 transitions, 762 flow [2024-02-07 14:44:06,667 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 14:44:06,670 INFO L231 Difference]: Finished difference. Result has 58 places, 54 transitions, 249 flow [2024-02-07 14:44:06,671 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 14:44:06,673 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 18 predicate places. [2024-02-07 14:44:06,673 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 54 transitions, 249 flow [2024-02-07 14:44:06,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.25) internal successors, (146), 8 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:44:06,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:44:06,674 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 14:44:06,713 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-02-07 14:44:06,890 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 14:44:06,891 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 14:44:06,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:44:06,892 INFO L85 PathProgramCache]: Analyzing trace with hash 109683331, now seen corresponding path program 1 times [2024-02-07 14:44:06,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:44:06,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997178214] [2024-02-07 14:44:06,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:44:06,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:44:06,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:44:06,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:44:06,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:44:06,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997178214] [2024-02-07 14:44:06,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997178214] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:44:06,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:44:06,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-07 14:44:06,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174404842] [2024-02-07 14:44:06,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:44:06,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 14:44:06,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:44:06,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 14:44:06,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 14:44:06,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-02-07 14:44:06,987 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 14:44:06,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:44:06,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-02-07 14:44:06,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:44:07,139 INFO L124 PetriNetUnfolderBase]: 593/1362 cut-off events. [2024-02-07 14:44:07,140 INFO L125 PetriNetUnfolderBase]: For 477/477 co-relation queries the response was YES. [2024-02-07 14:44:07,142 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 7027 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 14:44:07,146 INFO L140 encePairwiseOnDemand]: 38/42 looper letters, 44 selfloop transitions, 4 changer transitions 0/59 dead transitions. [2024-02-07 14:44:07,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 59 transitions, 327 flow [2024-02-07 14:44:07,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 14:44:07,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 14:44:07,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 81 transitions. [2024-02-07 14:44:07,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2024-02-07 14:44:07,148 INFO L175 Difference]: Start difference. First operand has 58 places, 54 transitions, 249 flow. Second operand 3 states and 81 transitions. [2024-02-07 14:44:07,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 59 transitions, 327 flow [2024-02-07 14:44:07,151 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 14:44:07,152 INFO L231 Difference]: Finished difference. Result has 56 places, 48 transitions, 190 flow [2024-02-07 14:44:07,153 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 14:44:07,153 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 16 predicate places. [2024-02-07 14:44:07,153 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 48 transitions, 190 flow [2024-02-07 14:44:07,153 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 14:44:07,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:44:07,154 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 14:44:07,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-02-07 14:44:07,154 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 14:44:07,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:44:07,154 INFO L85 PathProgramCache]: Analyzing trace with hash -1597500184, now seen corresponding path program 1 times [2024-02-07 14:44:07,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:44:07,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234766885] [2024-02-07 14:44:07,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:44:07,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:44:07,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:44:07,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:44:07,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:44:07,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234766885] [2024-02-07 14:44:07,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234766885] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:44:07,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:44:07,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-02-07 14:44:07,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379032855] [2024-02-07 14:44:07,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:44:07,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-07 14:44:07,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:44:07,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-07 14:44:07,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-02-07 14:44:07,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-02-07 14:44:07,520 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 14:44:07,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:44:07,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-02-07 14:44:07,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:44:07,728 INFO L124 PetriNetUnfolderBase]: 651/1474 cut-off events. [2024-02-07 14:44:07,728 INFO L125 PetriNetUnfolderBase]: For 509/509 co-relation queries the response was YES. [2024-02-07 14:44:07,731 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 7873 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 14:44:07,736 INFO L140 encePairwiseOnDemand]: 37/42 looper letters, 62 selfloop transitions, 5 changer transitions 3/81 dead transitions. [2024-02-07 14:44:07,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 81 transitions, 422 flow [2024-02-07 14:44:07,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-07 14:44:07,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-07 14:44:07,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 134 transitions. [2024-02-07 14:44:07,737 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.638095238095238 [2024-02-07 14:44:07,738 INFO L175 Difference]: Start difference. First operand has 56 places, 48 transitions, 190 flow. Second operand 5 states and 134 transitions. [2024-02-07 14:44:07,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 81 transitions, 422 flow [2024-02-07 14:44:07,740 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 14:44:07,741 INFO L231 Difference]: Finished difference. Result has 61 places, 51 transitions, 222 flow [2024-02-07 14:44:07,742 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 14:44:07,742 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 21 predicate places. [2024-02-07 14:44:07,742 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 51 transitions, 222 flow [2024-02-07 14:44:07,742 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 14:44:07,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:44:07,743 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 14:44:07,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-02-07 14:44:07,743 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 14:44:07,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:44:07,744 INFO L85 PathProgramCache]: Analyzing trace with hash 636874789, now seen corresponding path program 1 times [2024-02-07 14:44:07,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:44:07,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752232346] [2024-02-07 14:44:07,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:44:07,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:44:07,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:44:08,207 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:44:08,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:44:08,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752232346] [2024-02-07 14:44:08,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752232346] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:44:08,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409656506] [2024-02-07 14:44:08,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:44:08,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:44:08,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:44:08,212 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 14:44:08,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-02-07 14:44:08,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:44:08,324 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 13 conjunts are in the unsatisfiable core [2024-02-07 14:44:08,328 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:44:08,343 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 14:44:08,380 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 14:44:08,464 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 14:44:08,502 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 14:44:08,502 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:44:08,815 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 14:44:08,870 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 14:44:08,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409656506] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:44:08,871 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:44:08,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 13 [2024-02-07 14:44:08,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569006883] [2024-02-07 14:44:08,872 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:44:08,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-02-07 14:44:08,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:44:08,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-02-07 14:44:08,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2024-02-07 14:44:08,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-02-07 14:44:08,874 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 14:44:08,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:44:08,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-02-07 14:44:08,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:44:09,463 INFO L124 PetriNetUnfolderBase]: 896/2015 cut-off events. [2024-02-07 14:44:09,463 INFO L125 PetriNetUnfolderBase]: For 902/902 co-relation queries the response was YES. [2024-02-07 14:44:09,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4506 conditions, 2015 events. 896/2015 cut-off events. For 902/902 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 10860 event pairs, 152 based on Foata normal form. 0/1990 useless extension candidates. Maximal degree in co-relation 3512. Up to 269 conditions per place. [2024-02-07 14:44:09,474 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 134 selfloop transitions, 23 changer transitions 0/168 dead transitions. [2024-02-07 14:44:09,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 168 transitions, 866 flow [2024-02-07 14:44:09,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-02-07 14:44:09,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-02-07 14:44:09,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 364 transitions. [2024-02-07 14:44:09,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-02-07 14:44:09,480 INFO L175 Difference]: Start difference. First operand has 61 places, 51 transitions, 222 flow. Second operand 14 states and 364 transitions. [2024-02-07 14:44:09,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 168 transitions, 866 flow [2024-02-07 14:44:09,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 168 transitions, 861 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-07 14:44:09,487 INFO L231 Difference]: Finished difference. Result has 76 places, 63 transitions, 358 flow [2024-02-07 14:44:09,487 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=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=358, PETRI_PLACES=76, PETRI_TRANSITIONS=63} [2024-02-07 14:44:09,488 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 36 predicate places. [2024-02-07 14:44:09,488 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 63 transitions, 358 flow [2024-02-07 14:44:09,488 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 14:44:09,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:44:09,489 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 14:44:09,512 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-02-07 14:44:09,700 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 14:44:09,703 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 14:44:09,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:44:09,703 INFO L85 PathProgramCache]: Analyzing trace with hash -681514876, now seen corresponding path program 1 times [2024-02-07 14:44:09,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:44:09,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810091952] [2024-02-07 14:44:09,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:44:09,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:44:09,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-07 14:44:09,763 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-02-07 14:44:09,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-07 14:44:09,816 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-02-07 14:44:09,816 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-02-07 14:44:09,817 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location t2Err2ASSERT_VIOLATIONERROR_FUNCTION (11 of 12 remaining) [2024-02-07 14:44:09,821 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (10 of 12 remaining) [2024-02-07 14:44:09,821 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (9 of 12 remaining) [2024-02-07 14:44:09,821 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (8 of 12 remaining) [2024-02-07 14:44:09,821 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (7 of 12 remaining) [2024-02-07 14:44:09,822 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (6 of 12 remaining) [2024-02-07 14:44:09,822 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err1ASSERT_VIOLATIONWITNESS_INVARIANT (5 of 12 remaining) [2024-02-07 14:44:09,822 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err2ASSERT_VIOLATIONERROR_FUNCTION (4 of 12 remaining) [2024-02-07 14:44:09,823 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 12 remaining) [2024-02-07 14:44:09,824 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 12 remaining) [2024-02-07 14:44:09,824 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (1 of 12 remaining) [2024-02-07 14:44:09,824 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err1ASSERT_VIOLATIONWITNESS_INVARIANT (0 of 12 remaining) [2024-02-07 14:44:09,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-02-07 14:44:09,825 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:44:09,831 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-02-07 14:44:09,831 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-02-07 14:44:09,905 INFO L503 ceAbstractionStarter]: Automizer considered 3 witness invariants [2024-02-07 14:44:09,905 INFO L504 ceAbstractionStarter]: WitnessConsidered=3 [2024-02-07 14:44:09,905 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.02 02:44:09 BasicIcfg [2024-02-07 14:44:09,905 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-02-07 14:44:09,906 INFO L158 Benchmark]: Toolchain (without parser) took 7050.16ms. Allocated memory was 134.2MB in the beginning and 339.7MB in the end (delta: 205.5MB). Free memory was 76.6MB in the beginning and 153.3MB in the end (delta: -76.7MB). Peak memory consumption was 130.2MB. Max. memory is 16.1GB. [2024-02-07 14:44:09,906 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 134.2MB. Free memory is still 101.3MB. There was no memory consumed. Max. memory is 16.1GB. [2024-02-07 14:44:09,906 INFO L158 Benchmark]: Witness Parser took 0.11ms. Allocated memory is still 134.2MB. Free memory is still 78.7MB. There was no memory consumed. Max. memory is 16.1GB. [2024-02-07 14:44:09,906 INFO L158 Benchmark]: CACSL2BoogieTranslator took 892.05ms. Allocated memory is still 134.2MB. Free memory was 76.3MB in the beginning and 42.4MB in the end (delta: 33.9MB). Peak memory consumption was 33.6MB. Max. memory is 16.1GB. [2024-02-07 14:44:09,906 INFO L158 Benchmark]: Boogie Procedure Inliner took 67.47ms. Allocated memory is still 134.2MB. Free memory was 42.4MB in the beginning and 39.5MB in the end (delta: 2.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-02-07 14:44:09,907 INFO L158 Benchmark]: Boogie Preprocessor took 105.21ms. Allocated memory is still 134.2MB. Free memory was 39.5MB in the beginning and 103.0MB in the end (delta: -63.4MB). Peak memory consumption was 11.5MB. Max. memory is 16.1GB. [2024-02-07 14:44:09,907 INFO L158 Benchmark]: RCFGBuilder took 625.69ms. Allocated memory was 134.2MB in the beginning and 211.8MB in the end (delta: 77.6MB). Free memory was 102.9MB in the beginning and 138.1MB in the end (delta: -35.3MB). Peak memory consumption was 46.8MB. Max. memory is 16.1GB. [2024-02-07 14:44:09,907 INFO L158 Benchmark]: TraceAbstraction took 5338.04ms. Allocated memory was 211.8MB in the beginning and 339.7MB in the end (delta: 127.9MB). Free memory was 137.1MB in the beginning and 153.3MB in the end (delta: -16.2MB). Peak memory consumption was 111.7MB. Max. memory is 16.1GB. [2024-02-07 14:44:09,908 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 134.2MB. Free memory is still 101.3MB. There was no memory consumed. Max. memory is 16.1GB. * Witness Parser took 0.11ms. Allocated memory is still 134.2MB. Free memory is still 78.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 892.05ms. Allocated memory is still 134.2MB. Free memory was 76.3MB in the beginning and 42.4MB in the end (delta: 33.9MB). Peak memory consumption was 33.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 67.47ms. Allocated memory is still 134.2MB. Free memory was 42.4MB in the beginning and 39.5MB in the end (delta: 2.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 105.21ms. Allocated memory is still 134.2MB. Free memory was 39.5MB in the beginning and 103.0MB in the end (delta: -63.4MB). Peak memory consumption was 11.5MB. Max. memory is 16.1GB. * RCFGBuilder took 625.69ms. Allocated memory was 134.2MB in the beginning and 211.8MB in the end (delta: 77.6MB). Free memory was 102.9MB in the beginning and 138.1MB in the end (delta: -35.3MB). Peak memory consumption was 46.8MB. Max. memory is 16.1GB. * TraceAbstraction took 5338.04ms. Allocated memory was 211.8MB in the beginning and 339.7MB in the end (delta: 127.9MB). Free memory was 137.1MB in the beginning and 153.3MB in the end (delta: -16.2MB). Peak memory consumption was 111.7MB. 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: 5.2s, OverallIterations: 8, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 2.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 653 SdHoareTripleChecker+Valid, 0.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 628 mSDsluCounter, 10 SdHoareTripleChecker+Invalid, 0.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 42 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1033 IncrementalHoareTripleChecker+Invalid, 1075 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 42 mSolverCounterUnsat, 10 mSDtfsCounter, 1033 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 121 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=358occurred in iteration=7, InterpolantAutomatonStates: 44, 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: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.0s InterpolantComputationTime, 185 NumberOfCodeBlocks, 185 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 190 ConstructedInterpolants, 8 QuantifiedInterpolants, 2134 SizeOfPredicates, 21 NumberOfNonLiveVariables, 354 ConjunctsInSsa, 18 ConjunctsInUnsatCore, 11 InterpolantComputations, 5 PerfectInterpolantSequences, 3/33 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 14:44:09,928 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