./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread/stack_longer-2.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/stack_longer-2.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 80b1b132 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread/stack_longer-2.i ./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/stack_longer-2.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --- Real Ultimate output --- This is Ultimate 0.2.4-?-80b1b13-m [2024-01-31 16:40:49,718 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-31 16:40:49,778 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-31 16:40:49,783 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-31 16:40:49,783 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-31 16:40:49,815 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-31 16:40:49,815 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-31 16:40:49,815 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-31 16:40:49,816 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-31 16:40:49,819 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-31 16:40:49,819 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-31 16:40:49,820 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-31 16:40:49,820 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-31 16:40:49,821 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-31 16:40:49,821 INFO L153 SettingsManager]: * Use SBE=true [2024-01-31 16:40:49,821 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-31 16:40:49,822 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-31 16:40:49,822 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-31 16:40:49,822 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-31 16:40:49,822 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-31 16:40:49,822 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-31 16:40:49,823 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-31 16:40:49,823 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-31 16:40:49,823 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-31 16:40:49,823 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-31 16:40:49,824 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-31 16:40:49,824 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-31 16:40:49,824 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-31 16:40:49,824 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-31 16:40:49,825 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-31 16:40:49,825 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-31 16:40:49,826 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-31 16:40:49,826 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-31 16:40:49,826 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-31 16:40:49,826 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-31 16:40:49,826 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-31 16:40:49,826 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-31 16:40:49,827 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-31 16:40:49,827 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-31 16:40:49,827 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-31 16:40:49,827 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-31 16:40:49,827 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-31 16:40:49,828 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-31 16:40:49,828 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-01-31 16:40:50,034 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-31 16:40:50,052 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-31 16:40:50,054 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-31 16:40:50,055 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-31 16:40:50,055 INFO L274 PluginConnector]: CDTParser initialized [2024-01-31 16:40:50,056 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/stack_longer-2.i [2024-01-31 16:40:51,305 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-31 16:40:51,496 INFO L384 CDTParser]: Found 1 translation units. [2024-01-31 16:40:51,497 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack_longer-2.i [2024-01-31 16:40:51,511 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/596e0f128/475b99e0be654d2aa5196835ac7fd4c4/FLAG783a17f78 [2024-01-31 16:40:51,521 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/596e0f128/475b99e0be654d2aa5196835ac7fd4c4 [2024-01-31 16:40:51,524 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-01-31 16:40:51,524 INFO L274 PluginConnector]: Witness Parser initialized [2024-01-31 16:40:51,525 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/stack_longer-2.yml/witness.yml [2024-01-31 16:40:51,626 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-31 16:40:51,627 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-01-31 16:40:51,629 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-31 16:40:51,629 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-31 16:40:51,632 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-31 16:40:51,633 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 04:40:51" (1/2) ... [2024-01-31 16:40:51,634 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a6d74e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:40:51, skipping insertion in model container [2024-01-31 16:40:51,634 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 04:40:51" (1/2) ... [2024-01-31 16:40:51,636 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@692dfe8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:40:51, skipping insertion in model container [2024-01-31 16:40:51,636 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 04:40:51" (2/2) ... [2024-01-31 16:40:51,637 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a6d74e7 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:40:51, skipping insertion in model container [2024-01-31 16:40:51,637 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 04:40:51" (2/2) ... [2024-01-31 16:40:51,637 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-01-31 16:40:51,716 INFO L96 nessWitnessExtractor]: Found the following entries in the witness: [2024-01-31 16:40:51,717 INFO L98 nessWitnessExtractor]: Location invariant before [L996-L996] ((unsigned long )arg == 0UL) && (((((((((((i == 4 || i == 3) || i == 3) || i == 2) || i == 2) || i == 1) || i == 1) || (0 == i && i == 0)) || (0 == i && i == 0)) || (5 <= i && i <= 399)) || (5 <= i && i <= 399)) || i == 4) [2024-01-31 16:40:51,718 INFO L98 nessWitnessExtractor]: Location invariant before [L1010-L1010] ((unsigned long )arg == 0UL) && ((((((((((((((((i == 5 || i == 4) || i == 4) || i == 3) || i == 3) || i == 2) || i == 2) || i == 1) || i == 1) || (8 <= i && i <= 399)) || (0 == i && i == 0)) || (8 <= i && i <= 399)) || (0 == i && i == 0)) || i == 7) || i == 7) || i == 6) || i == 6) [2024-01-31 16:40:51,790 INFO L179 MainTranslator]: Built tables and reachable declarations [2024-01-31 16:40:52,117 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-2.i[41529,41542] [2024-01-31 16:40:52,133 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-31 16:40:52,146 INFO L204 MainTranslator]: Completed pre-run [2024-01-31 16:40:52,195 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-2.i[41529,41542] Start Parsing Local Start Parsing Local [2024-01-31 16:40:52,231 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-31 16:40:52,278 INFO L208 MainTranslator]: Completed translation [2024-01-31 16:40:52,280 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:40:52 WrapperNode [2024-01-31 16:40:52,280 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-31 16:40:52,281 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-31 16:40:52,281 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-31 16:40:52,282 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-31 16:40:52,287 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 31.01 04:40:52" (1/1) ... [2024-01-31 16:40:52,319 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 31.01 04:40:52" (1/1) ... [2024-01-31 16:40:52,357 INFO L138 Inliner]: procedures = 278, calls = 40, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 158 [2024-01-31 16:40:52,357 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-31 16:40:52,358 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-31 16:40:52,359 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-31 16:40:52,359 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-31 16:40:52,367 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:40:52" (1/1) ... [2024-01-31 16:40:52,368 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:40:52" (1/1) ... [2024-01-31 16:40:52,381 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:40:52" (1/1) ... [2024-01-31 16:40:52,400 INFO L175 MemorySlicer]: Split 14 memory accesses to 5 slices as follows [2, 5, 2, 2, 3]. 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, 1, 1, 2]. [2024-01-31 16:40:52,406 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:40:52" (1/1) ... [2024-01-31 16:40:52,406 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:40:52" (1/1) ... [2024-01-31 16:40:52,415 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:40:52" (1/1) ... [2024-01-31 16:40:52,423 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:40:52" (1/1) ... [2024-01-31 16:40:52,429 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:40:52" (1/1) ... [2024-01-31 16:40:52,431 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:40:52" (1/1) ... [2024-01-31 16:40:52,433 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-31 16:40:52,433 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-31 16:40:52,434 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-31 16:40:52,434 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-31 16:40:52,439 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:40:52" (1/1) ... [2024-01-31 16:40:52,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-31 16:40:52,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:40:52,492 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-01-31 16:40:52,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-01-31 16:40:52,530 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2024-01-31 16:40:52,542 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2024-01-31 16:40:52,542 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2024-01-31 16:40:52,542 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2024-01-31 16:40:52,542 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-31 16:40:52,542 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-31 16:40:52,542 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-01-31 16:40:52,542 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-01-31 16:40:52,542 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-01-31 16:40:52,542 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-01-31 16:40:52,542 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-01-31 16:40:52,543 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-01-31 16:40:52,543 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-31 16:40:52,543 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-31 16:40:52,543 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-31 16:40:52,543 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-01-31 16:40:52,543 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-01-31 16:40:52,543 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-01-31 16:40:52,543 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-31 16:40:52,544 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-31 16:40:52,544 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-31 16:40:52,544 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-31 16:40:52,544 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-01-31 16:40:52,544 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-01-31 16:40:52,544 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-31 16:40:52,544 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-31 16:40:52,546 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-01-31 16:40:52,666 INFO L244 CfgBuilder]: Building ICFG [2024-01-31 16:40:52,668 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-31 16:40:52,947 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-31 16:40:52,947 INFO L293 CfgBuilder]: Performing block encoding [2024-01-31 16:40:53,160 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-31 16:40:53,160 INFO L320 CfgBuilder]: Removed 2 assume(true) statements. [2024-01-31 16:40:53,161 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 04:40:53 BoogieIcfgContainer [2024-01-31 16:40:53,161 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-31 16:40:53,163 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-31 16:40:53,163 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-31 16:40:53,166 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-31 16:40:53,166 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 04:40:51" (1/4) ... [2024-01-31 16:40:53,167 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56adf719 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 04:40:53, skipping insertion in model container [2024-01-31 16:40:53,167 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 04:40:51" (2/4) ... [2024-01-31 16:40:53,167 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56adf719 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 31.01 04:40:53, skipping insertion in model container [2024-01-31 16:40:53,168 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:40:52" (3/4) ... [2024-01-31 16:40:53,168 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56adf719 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 31.01 04:40:53, skipping insertion in model container [2024-01-31 16:40:53,168 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 04:40:53" (4/4) ... [2024-01-31 16:40:53,169 INFO L112 eAbstractionObserver]: Analyzing ICFG stack_longer-2.i [2024-01-31 16:40:53,183 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-31 16:40:53,184 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-01-31 16:40:53,184 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-31 16:40:53,235 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-01-31 16:40:53,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 41 places, 39 transitions, 92 flow [2024-01-31 16:40:53,291 INFO L124 PetriNetUnfolderBase]: 5/37 cut-off events. [2024-01-31 16:40:53,291 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-31 16:40:53,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46 conditions, 37 events. 5/37 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 85 event pairs, 0 based on Foata normal form. 0/28 useless extension candidates. Maximal degree in co-relation 33. Up to 3 conditions per place. [2024-01-31 16:40:53,295 INFO L82 GeneralOperation]: Start removeDead. Operand has 41 places, 39 transitions, 92 flow [2024-01-31 16:40:53,298 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 37 places, 35 transitions, 79 flow [2024-01-31 16:40:53,310 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-31 16:40:53,319 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;@7bad8e08, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-31 16:40:53,319 INFO L358 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2024-01-31 16:40:53,325 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-31 16:40:53,325 INFO L124 PetriNetUnfolderBase]: 0/13 cut-off events. [2024-01-31 16:40:53,326 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-01-31 16:40:53,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:40:53,326 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:40:53,327 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 8 more)] === [2024-01-31 16:40:53,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:40:53,361 INFO L85 PathProgramCache]: Analyzing trace with hash 1267867462, now seen corresponding path program 1 times [2024-01-31 16:40:53,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:40:53,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116133479] [2024-01-31 16:40:53,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:40:53,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:40:53,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:40:53,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:40:53,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:40:53,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116133479] [2024-01-31 16:40:53,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116133479] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:40:53,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:40:53,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 16:40:53,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639487292] [2024-01-31 16:40:53,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:40:53,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 16:40:53,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:40:53,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 16:40:53,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-31 16:40:53,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 39 [2024-01-31 16:40:53,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 35 transitions, 79 flow. Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:40:53,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:40:53,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 39 [2024-01-31 16:40:53,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:40:54,016 INFO L124 PetriNetUnfolderBase]: 478/902 cut-off events. [2024-01-31 16:40:54,017 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2024-01-31 16:40:54,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1741 conditions, 902 events. 478/902 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 4414 event pairs, 258 based on Foata normal form. 88/879 useless extension candidates. Maximal degree in co-relation 1655. Up to 492 conditions per place. [2024-01-31 16:40:54,023 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 40 selfloop transitions, 3 changer transitions 0/51 dead transitions. [2024-01-31 16:40:54,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 51 transitions, 200 flow [2024-01-31 16:40:54,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 16:40:54,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 16:40:54,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 89 transitions. [2024-01-31 16:40:54,036 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5705128205128205 [2024-01-31 16:40:54,037 INFO L175 Difference]: Start difference. First operand has 37 places, 35 transitions, 79 flow. Second operand 4 states and 89 transitions. [2024-01-31 16:40:54,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 51 transitions, 200 flow [2024-01-31 16:40:54,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 51 transitions, 194 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-01-31 16:40:54,044 INFO L231 Difference]: Finished difference. Result has 38 places, 34 transitions, 86 flow [2024-01-31 16:40:54,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=86, PETRI_PLACES=38, PETRI_TRANSITIONS=34} [2024-01-31 16:40:54,049 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 1 predicate places. [2024-01-31 16:40:54,050 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 34 transitions, 86 flow [2024-01-31 16:40:54,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:40:54,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:40:54,051 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:40:54,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-31 16:40:54,052 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t1Err1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 8 more)] === [2024-01-31 16:40:54,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:40:54,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1350067287, now seen corresponding path program 1 times [2024-01-31 16:40:54,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:40:54,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339156586] [2024-01-31 16:40:54,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:40:54,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:40:54,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:40:54,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:40:54,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:40:54,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339156586] [2024-01-31 16:40:54,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339156586] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:40:54,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:40:54,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 16:40:54,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640654776] [2024-01-31 16:40:54,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:40:54,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 16:40:54,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:40:54,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 16:40:54,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-31 16:40:54,173 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 39 [2024-01-31 16:40:54,174 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 34 transitions, 86 flow. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:40:54,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:40:54,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 39 [2024-01-31 16:40:54,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:40:54,311 INFO L124 PetriNetUnfolderBase]: 430/800 cut-off events. [2024-01-31 16:40:54,311 INFO L125 PetriNetUnfolderBase]: For 33/33 co-relation queries the response was YES. [2024-01-31 16:40:54,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1665 conditions, 800 events. 430/800 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 3803 event pairs, 49 based on Foata normal form. 6/757 useless extension candidates. Maximal degree in co-relation 1364. Up to 569 conditions per place. [2024-01-31 16:40:54,316 INFO L140 encePairwiseOnDemand]: 34/39 looper letters, 47 selfloop transitions, 3 changer transitions 0/58 dead transitions. [2024-01-31 16:40:54,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 58 transitions, 238 flow [2024-01-31 16:40:54,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 16:40:54,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 16:40:54,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 91 transitions. [2024-01-31 16:40:54,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-01-31 16:40:54,318 INFO L175 Difference]: Start difference. First operand has 38 places, 34 transitions, 86 flow. Second operand 4 states and 91 transitions. [2024-01-31 16:40:54,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 58 transitions, 238 flow [2024-01-31 16:40:54,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 58 transitions, 234 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-31 16:40:54,320 INFO L231 Difference]: Finished difference. Result has 41 places, 36 transitions, 104 flow [2024-01-31 16:40:54,320 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=104, PETRI_PLACES=41, PETRI_TRANSITIONS=36} [2024-01-31 16:40:54,320 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 4 predicate places. [2024-01-31 16:40:54,321 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 36 transitions, 104 flow [2024-01-31 16:40:54,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:40:54,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:40:54,321 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:40:54,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-01-31 16:40:54,322 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 8 more)] === [2024-01-31 16:40:54,322 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:40:54,322 INFO L85 PathProgramCache]: Analyzing trace with hash -607712337, now seen corresponding path program 1 times [2024-01-31 16:40:54,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:40:54,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046483905] [2024-01-31 16:40:54,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:40:54,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:40:54,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:40:54,474 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:40:54,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:40:54,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046483905] [2024-01-31 16:40:54,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046483905] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:40:54,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459289427] [2024-01-31 16:40:54,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:40:54,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:40:54,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:40:54,480 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:40:54,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-01-31 16:40:54,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:40:54,578 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-31 16:40:54,582 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:40:54,652 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:40:54,653 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:40:55,063 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:40:55,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459289427] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:40:55,063 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:40:55,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2024-01-31 16:40:55,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595979827] [2024-01-31 16:40:55,064 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:40:55,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-01-31 16:40:55,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:40:55,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-01-31 16:40:55,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-01-31 16:40:55,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 39 [2024-01-31 16:40:55,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 36 transitions, 104 flow. Second operand has 10 states, 10 states have (on average 12.1) internal successors, (121), 10 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:40:55,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:40:55,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 39 [2024-01-31 16:40:55,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:40:55,452 INFO L124 PetriNetUnfolderBase]: 922/1603 cut-off events. [2024-01-31 16:40:55,452 INFO L125 PetriNetUnfolderBase]: For 33/33 co-relation queries the response was YES. [2024-01-31 16:40:55,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3538 conditions, 1603 events. 922/1603 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 7267 event pairs, 22 based on Foata normal form. 108/1575 useless extension candidates. Maximal degree in co-relation 3142. Up to 388 conditions per place. [2024-01-31 16:40:55,459 INFO L140 encePairwiseOnDemand]: 33/39 looper letters, 102 selfloop transitions, 7 changer transitions 0/116 dead transitions. [2024-01-31 16:40:55,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 116 transitions, 508 flow [2024-01-31 16:40:55,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-01-31 16:40:55,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-01-31 16:40:55,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-01-31 16:40:55,464 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5993589743589743 [2024-01-31 16:40:55,465 INFO L175 Difference]: Start difference. First operand has 41 places, 36 transitions, 104 flow. Second operand 8 states and 187 transitions. [2024-01-31 16:40:55,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 116 transitions, 508 flow [2024-01-31 16:40:55,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 116 transitions, 506 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-31 16:40:55,469 INFO L231 Difference]: Finished difference. Result has 50 places, 38 transitions, 139 flow [2024-01-31 16:40:55,470 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=139, PETRI_PLACES=50, PETRI_TRANSITIONS=38} [2024-01-31 16:40:55,471 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 13 predicate places. [2024-01-31 16:40:55,471 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 38 transitions, 139 flow [2024-01-31 16:40:55,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.1) internal successors, (121), 10 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:40:55,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:40:55,473 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:40:55,488 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-01-31 16:40:55,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:40:55,685 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t2Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 8 more)] === [2024-01-31 16:40:55,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:40:55,686 INFO L85 PathProgramCache]: Analyzing trace with hash -566933092, now seen corresponding path program 1 times [2024-01-31 16:40:55,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:40:55,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575199570] [2024-01-31 16:40:55,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:40:55,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:40:55,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:40:55,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:40:55,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:40:55,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575199570] [2024-01-31 16:40:55,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575199570] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:40:55,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:40:55,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 16:40:55,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551400694] [2024-01-31 16:40:55,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:40:55,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 16:40:55,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:40:55,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 16:40:55,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-31 16:40:55,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 39 [2024-01-31 16:40:55,744 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 38 transitions, 139 flow. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:40:55,744 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:40:55,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 39 [2024-01-31 16:40:55,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:40:55,850 INFO L124 PetriNetUnfolderBase]: 478/1027 cut-off events. [2024-01-31 16:40:55,851 INFO L125 PetriNetUnfolderBase]: For 425/425 co-relation queries the response was YES. [2024-01-31 16:40:55,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2406 conditions, 1027 events. 478/1027 cut-off events. For 425/425 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 4359 event pairs, 129 based on Foata normal form. 58/1034 useless extension candidates. Maximal degree in co-relation 1702. Up to 569 conditions per place. [2024-01-31 16:40:55,856 INFO L140 encePairwiseOnDemand]: 35/39 looper letters, 39 selfloop transitions, 4 changer transitions 0/52 dead transitions. [2024-01-31 16:40:55,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 52 transitions, 291 flow [2024-01-31 16:40:55,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 16:40:55,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 16:40:55,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 70 transitions. [2024-01-31 16:40:55,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5982905982905983 [2024-01-31 16:40:55,857 INFO L175 Difference]: Start difference. First operand has 50 places, 38 transitions, 139 flow. Second operand 3 states and 70 transitions. [2024-01-31 16:40:55,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 52 transitions, 291 flow [2024-01-31 16:40:55,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 52 transitions, 271 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-01-31 16:40:55,860 INFO L231 Difference]: Finished difference. Result has 49 places, 38 transitions, 136 flow [2024-01-31 16:40:55,860 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=136, PETRI_PLACES=49, PETRI_TRANSITIONS=38} [2024-01-31 16:40:55,860 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 12 predicate places. [2024-01-31 16:40:55,861 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 38 transitions, 136 flow [2024-01-31 16:40:55,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:40:55,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:40:55,861 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:40:55,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-01-31 16:40:55,861 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t1Err1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 8 more)] === [2024-01-31 16:40:55,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:40:55,862 INFO L85 PathProgramCache]: Analyzing trace with hash 104010194, now seen corresponding path program 1 times [2024-01-31 16:40:55,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:40:55,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324462236] [2024-01-31 16:40:55,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:40:55,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:40:55,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:40:55,986 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:40:55,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:40:55,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324462236] [2024-01-31 16:40:55,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324462236] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:40:55,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952807059] [2024-01-31 16:40:55,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:40:55,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:40:55,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:40:56,001 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:40:56,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-01-31 16:40:56,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:40:56,098 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 7 conjunts are in the unsatisfiable core [2024-01-31 16:40:56,101 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:40:56,140 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 [2024-01-31 16:40:56,201 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:40:56,202 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:40:56,266 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:40:56,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952807059] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:40:56,266 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:40:56,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2024-01-31 16:40:56,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453674553] [2024-01-31 16:40:56,267 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:40:56,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-01-31 16:40:56,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:40:56,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-01-31 16:40:56,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-01-31 16:40:56,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 39 [2024-01-31 16:40:56,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 38 transitions, 136 flow. Second operand has 11 states, 11 states have (on average 12.545454545454545) internal successors, (138), 11 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:40:56,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:40:56,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 39 [2024-01-31 16:40:56,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:40:56,808 INFO L124 PetriNetUnfolderBase]: 1402/2785 cut-off events. [2024-01-31 16:40:56,808 INFO L125 PetriNetUnfolderBase]: For 1345/1345 co-relation queries the response was YES. [2024-01-31 16:40:56,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6965 conditions, 2785 events. 1402/2785 cut-off events. For 1345/1345 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 15165 event pairs, 211 based on Foata normal form. 40/2772 useless extension candidates. Maximal degree in co-relation 6062. Up to 527 conditions per place. [2024-01-31 16:40:56,824 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 141 selfloop transitions, 19 changer transitions 3/170 dead transitions. [2024-01-31 16:40:56,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 170 transitions, 911 flow [2024-01-31 16:40:56,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-01-31 16:40:56,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-01-31 16:40:56,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 262 transitions. [2024-01-31 16:40:56,826 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5598290598290598 [2024-01-31 16:40:56,826 INFO L175 Difference]: Start difference. First operand has 49 places, 38 transitions, 136 flow. Second operand 12 states and 262 transitions. [2024-01-31 16:40:56,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 170 transitions, 911 flow [2024-01-31 16:40:56,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 170 transitions, 889 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-31 16:40:56,833 INFO L231 Difference]: Finished difference. Result has 65 places, 56 transitions, 266 flow [2024-01-31 16:40:56,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=266, PETRI_PLACES=65, PETRI_TRANSITIONS=56} [2024-01-31 16:40:56,834 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 28 predicate places. [2024-01-31 16:40:56,835 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 56 transitions, 266 flow [2024-01-31 16:40:56,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.545454545454545) internal successors, (138), 11 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:40:56,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:40:56,835 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:40:56,850 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-01-31 16:40:57,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:40:57,052 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t2Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 8 more)] === [2024-01-31 16:40:57,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:40:57,053 INFO L85 PathProgramCache]: Analyzing trace with hash 955453007, now seen corresponding path program 1 times [2024-01-31 16:40:57,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:40:57,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827903022] [2024-01-31 16:40:57,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:40:57,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:40:57,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:40:57,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:40:57,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:40:57,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827903022] [2024-01-31 16:40:57,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827903022] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:40:57,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:40:57,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 16:40:57,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548425026] [2024-01-31 16:40:57,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:40:57,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 16:40:57,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:40:57,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 16:40:57,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-31 16:40:57,149 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 39 [2024-01-31 16:40:57,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 56 transitions, 266 flow. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:40:57,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:40:57,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 39 [2024-01-31 16:40:57,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:40:57,553 INFO L124 PetriNetUnfolderBase]: 1790/3647 cut-off events. [2024-01-31 16:40:57,553 INFO L125 PetriNetUnfolderBase]: For 2553/2557 co-relation queries the response was YES. [2024-01-31 16:40:57,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9421 conditions, 3647 events. 1790/3647 cut-off events. For 2553/2557 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 22555 event pairs, 809 based on Foata normal form. 84/3632 useless extension candidates. Maximal degree in co-relation 7760. Up to 2339 conditions per place. [2024-01-31 16:40:57,582 INFO L140 encePairwiseOnDemand]: 34/39 looper letters, 94 selfloop transitions, 3 changer transitions 0/111 dead transitions. [2024-01-31 16:40:57,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 111 transitions, 777 flow [2024-01-31 16:40:57,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 16:40:57,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 16:40:57,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 94 transitions. [2024-01-31 16:40:57,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6025641025641025 [2024-01-31 16:40:57,584 INFO L175 Difference]: Start difference. First operand has 65 places, 56 transitions, 266 flow. Second operand 4 states and 94 transitions. [2024-01-31 16:40:57,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 111 transitions, 777 flow [2024-01-31 16:40:57,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 111 transitions, 751 flow, removed 13 selfloop flow, removed 0 redundant places. [2024-01-31 16:40:57,599 INFO L231 Difference]: Finished difference. Result has 69 places, 57 transitions, 272 flow [2024-01-31 16:40:57,599 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=272, PETRI_PLACES=69, PETRI_TRANSITIONS=57} [2024-01-31 16:40:57,602 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 32 predicate places. [2024-01-31 16:40:57,602 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 57 transitions, 272 flow [2024-01-31 16:40:57,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:40:57,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:40:57,602 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:40:57,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-01-31 16:40:57,603 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 8 more)] === [2024-01-31 16:40:57,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:40:57,603 INFO L85 PathProgramCache]: Analyzing trace with hash 1512258483, now seen corresponding path program 1 times [2024-01-31 16:40:57,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:40:57,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108756377] [2024-01-31 16:40:57,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:40:57,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:40:57,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:40:58,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:40:58,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:40:58,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108756377] [2024-01-31 16:40:58,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108756377] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:40:58,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:40:58,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-01-31 16:40:58,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955184340] [2024-01-31 16:40:58,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:40:58,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-31 16:40:58,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:40:58,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-31 16:40:58,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-01-31 16:40:58,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 39 [2024-01-31 16:40:58,014 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 57 transitions, 272 flow. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:40:58,014 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:40:58,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 39 [2024-01-31 16:40:58,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:40:58,549 INFO L124 PetriNetUnfolderBase]: 1839/3618 cut-off events. [2024-01-31 16:40:58,549 INFO L125 PetriNetUnfolderBase]: For 3574/3574 co-relation queries the response was YES. [2024-01-31 16:40:58,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10518 conditions, 3618 events. 1839/3618 cut-off events. For 3574/3574 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 21242 event pairs, 521 based on Foata normal form. 8/3577 useless extension candidates. Maximal degree in co-relation 8416. Up to 2729 conditions per place. [2024-01-31 16:40:58,576 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 89 selfloop transitions, 7 changer transitions 0/103 dead transitions. [2024-01-31 16:40:58,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 103 transitions, 642 flow [2024-01-31 16:40:58,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-31 16:40:58,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-31 16:40:58,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-01-31 16:40:58,577 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5018315018315018 [2024-01-31 16:40:58,577 INFO L175 Difference]: Start difference. First operand has 69 places, 57 transitions, 272 flow. Second operand 7 states and 137 transitions. [2024-01-31 16:40:58,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 103 transitions, 642 flow [2024-01-31 16:40:58,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 103 transitions, 625 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-31 16:40:58,585 INFO L231 Difference]: Finished difference. Result has 77 places, 62 transitions, 327 flow [2024-01-31 16:40:58,585 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=268, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=327, PETRI_PLACES=77, PETRI_TRANSITIONS=62} [2024-01-31 16:40:58,586 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 40 predicate places. [2024-01-31 16:40:58,586 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 62 transitions, 327 flow [2024-01-31 16:40:58,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:40:58,586 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:40:58,586 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:40:58,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-01-31 16:40:58,587 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 8 more)] === [2024-01-31 16:40:58,587 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:40:58,587 INFO L85 PathProgramCache]: Analyzing trace with hash -1578851608, now seen corresponding path program 1 times [2024-01-31 16:40:58,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:40:58,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205821072] [2024-01-31 16:40:58,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:40:58,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:40:58,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:40:58,718 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:40:58,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:40:58,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205821072] [2024-01-31 16:40:58,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205821072] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:40:58,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540718513] [2024-01-31 16:40:58,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:40:58,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:40:58,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:40:58,720 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:40:58,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-01-31 16:40:58,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:40:58,853 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 13 conjunts are in the unsatisfiable core [2024-01-31 16:40:58,855 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:40:58,930 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:40:58,930 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:40:59,425 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:40:59,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540718513] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:40:59,426 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:40:59,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-01-31 16:40:59,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991473001] [2024-01-31 16:40:59,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:40:59,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-31 16:40:59,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:40:59,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-31 16:40:59,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-01-31 16:40:59,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 39 [2024-01-31 16:40:59,439 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 62 transitions, 327 flow. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:40:59,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:40:59,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 39 [2024-01-31 16:40:59,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:41:00,490 INFO L124 PetriNetUnfolderBase]: 3832/8637 cut-off events. [2024-01-31 16:41:00,491 INFO L125 PetriNetUnfolderBase]: For 9365/9373 co-relation queries the response was YES. [2024-01-31 16:41:00,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23528 conditions, 8637 events. 3832/8637 cut-off events. For 9365/9373 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 66640 event pairs, 678 based on Foata normal form. 798/9300 useless extension candidates. Maximal degree in co-relation 20003. Up to 2002 conditions per place. [2024-01-31 16:41:00,554 INFO L140 encePairwiseOnDemand]: 33/39 looper letters, 212 selfloop transitions, 11 changer transitions 0/237 dead transitions. [2024-01-31 16:41:00,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 237 transitions, 1814 flow [2024-01-31 16:41:00,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-31 16:41:00,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-31 16:41:00,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-01-31 16:41:00,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6593406593406593 [2024-01-31 16:41:00,555 INFO L175 Difference]: Start difference. First operand has 77 places, 62 transitions, 327 flow. Second operand 7 states and 180 transitions. [2024-01-31 16:41:00,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 237 transitions, 1814 flow [2024-01-31 16:41:00,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 237 transitions, 1790 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-31 16:41:00,581 INFO L231 Difference]: Finished difference. Result has 85 places, 70 transitions, 427 flow [2024-01-31 16:41:00,581 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=322, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=427, PETRI_PLACES=85, PETRI_TRANSITIONS=70} [2024-01-31 16:41:00,582 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 48 predicate places. [2024-01-31 16:41:00,582 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 70 transitions, 427 flow [2024-01-31 16:41:00,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:41:00,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:41:00,582 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:41:00,594 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-01-31 16:41:00,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:41:00,793 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 8 more)] === [2024-01-31 16:41:00,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:41:00,793 INFO L85 PathProgramCache]: Analyzing trace with hash -1588554674, now seen corresponding path program 1 times [2024-01-31 16:41:00,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:41:00,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855594671] [2024-01-31 16:41:00,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:41:00,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:41:00,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:41:01,225 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:41:01,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:41:01,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855594671] [2024-01-31 16:41:01,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855594671] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:41:01,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449124577] [2024-01-31 16:41:01,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:41:01,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:41:01,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:41:01,227 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:41:01,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-01-31 16:41:01,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:41:01,332 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 13 conjunts are in the unsatisfiable core [2024-01-31 16:41:01,335 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:41:01,358 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 [2024-01-31 16:41:01,435 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 25 treesize of output 1 [2024-01-31 16:41:01,533 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 80 treesize of output 32 [2024-01-31 16:41:01,575 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:41:01,575 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:41:01,939 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 [2024-01-31 16:41:01,972 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:41:01,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449124577] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:41:01,973 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:41:01,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2024-01-31 16:41:01,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657303805] [2024-01-31 16:41:01,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:41:01,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-01-31 16:41:01,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:41:01,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-01-31 16:41:01,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2024-01-31 16:41:01,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 39 [2024-01-31 16:41:01,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 70 transitions, 427 flow. Second operand has 20 states, 20 states have (on average 12.15) internal successors, (243), 20 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:41:01,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:41:01,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 39 [2024-01-31 16:41:01,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:41:04,868 INFO L124 PetriNetUnfolderBase]: 8186/16660 cut-off events. [2024-01-31 16:41:04,869 INFO L125 PetriNetUnfolderBase]: For 33682/33691 co-relation queries the response was YES. [2024-01-31 16:41:04,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54300 conditions, 16660 events. 8186/16660 cut-off events. For 33682/33691 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 128692 event pairs, 1009 based on Foata normal form. 244/16843 useless extension candidates. Maximal degree in co-relation 39490. Up to 2871 conditions per place. [2024-01-31 16:41:04,975 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 404 selfloop transitions, 57 changer transitions 27/495 dead transitions. [2024-01-31 16:41:04,976 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 495 transitions, 3816 flow [2024-01-31 16:41:04,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-01-31 16:41:04,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-01-31 16:41:04,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 613 transitions. [2024-01-31 16:41:04,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5821462488129154 [2024-01-31 16:41:04,978 INFO L175 Difference]: Start difference. First operand has 85 places, 70 transitions, 427 flow. Second operand 27 states and 613 transitions. [2024-01-31 16:41:04,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 495 transitions, 3816 flow [2024-01-31 16:41:05,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 495 transitions, 3647 flow, removed 68 selfloop flow, removed 2 redundant places. [2024-01-31 16:41:05,038 INFO L231 Difference]: Finished difference. Result has 120 places, 104 transitions, 835 flow [2024-01-31 16:41:05,038 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=418, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=835, PETRI_PLACES=120, PETRI_TRANSITIONS=104} [2024-01-31 16:41:05,038 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 83 predicate places. [2024-01-31 16:41:05,039 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 104 transitions, 835 flow [2024-01-31 16:41:05,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 12.15) internal successors, (243), 20 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:41:05,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:41:05,039 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:41:05,051 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-01-31 16:41:05,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:41:05,251 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t1Err1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 8 more)] === [2024-01-31 16:41:05,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:41:05,252 INFO L85 PathProgramCache]: Analyzing trace with hash -768569091, now seen corresponding path program 1 times [2024-01-31 16:41:05,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:41:05,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178965640] [2024-01-31 16:41:05,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:41:05,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:41:05,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:41:05,439 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 16:41:05,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:41:05,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178965640] [2024-01-31 16:41:05,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178965640] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:41:05,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136794714] [2024-01-31 16:41:05,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:41:05,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:41:05,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:41:05,441 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:41:05,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-01-31 16:41:05,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:41:05,549 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-31 16:41:05,552 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:41:05,569 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 [2024-01-31 16:41:05,602 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 [2024-01-31 16:41:05,721 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:41:05,721 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:41:05,750 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-31 16:41:05,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136794714] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:41:05,750 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:41:05,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 5] total 14 [2024-01-31 16:41:05,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158421440] [2024-01-31 16:41:05,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:41:05,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-01-31 16:41:05,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:41:05,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-01-31 16:41:05,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2024-01-31 16:41:05,756 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 39 [2024-01-31 16:41:05,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 104 transitions, 835 flow. Second operand has 14 states, 14 states have (on average 14.357142857142858) internal successors, (201), 14 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:41:05,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:41:05,757 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 39 [2024-01-31 16:41:05,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:41:08,947 INFO L124 PetriNetUnfolderBase]: 10935/22233 cut-off events. [2024-01-31 16:41:08,947 INFO L125 PetriNetUnfolderBase]: For 78192/78231 co-relation queries the response was YES. [2024-01-31 16:41:09,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79372 conditions, 22233 events. 10935/22233 cut-off events. For 78192/78231 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 181487 event pairs, 1481 based on Foata normal form. 316/22544 useless extension candidates. Maximal degree in co-relation 61424. Up to 3798 conditions per place. [2024-01-31 16:41:09,131 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 360 selfloop transitions, 91 changer transitions 9/467 dead transitions. [2024-01-31 16:41:09,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 467 transitions, 3985 flow [2024-01-31 16:41:09,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-01-31 16:41:09,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-01-31 16:41:09,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 509 transitions. [2024-01-31 16:41:09,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5438034188034188 [2024-01-31 16:41:09,133 INFO L175 Difference]: Start difference. First operand has 120 places, 104 transitions, 835 flow. Second operand 24 states and 509 transitions. [2024-01-31 16:41:09,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 467 transitions, 3985 flow [2024-01-31 16:41:09,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 467 transitions, 3861 flow, removed 60 selfloop flow, removed 2 redundant places. [2024-01-31 16:41:09,292 INFO L231 Difference]: Finished difference. Result has 152 places, 151 transitions, 1463 flow [2024-01-31 16:41:09,293 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=755, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1463, PETRI_PLACES=152, PETRI_TRANSITIONS=151} [2024-01-31 16:41:09,293 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 115 predicate places. [2024-01-31 16:41:09,293 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 151 transitions, 1463 flow [2024-01-31 16:41:09,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 14.357142857142858) internal successors, (201), 14 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:41:09,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:41:09,295 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:41:09,309 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-01-31 16:41:09,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-01-31 16:41:09,500 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t2Err1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 8 more)] === [2024-01-31 16:41:09,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:41:09,501 INFO L85 PathProgramCache]: Analyzing trace with hash -1213291707, now seen corresponding path program 1 times [2024-01-31 16:41:09,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:41:09,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149620003] [2024-01-31 16:41:09,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:41:09,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:41:09,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:41:10,170 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:41:10,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:41:10,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149620003] [2024-01-31 16:41:10,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149620003] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:41:10,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987065697] [2024-01-31 16:41:10,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:41:10,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:41:10,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:41:10,172 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:41:10,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-01-31 16:41:10,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:41:10,290 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 16 conjunts are in the unsatisfiable core [2024-01-31 16:41:10,294 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:41:10,330 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 23 treesize of output 1 [2024-01-31 16:41:10,408 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 50 treesize of output 19 [2024-01-31 16:41:10,604 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 56 treesize of output 32 [2024-01-31 16:41:10,630 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:41:10,631 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:41:11,057 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:41:11,058 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 1 case distinctions, treesize of input 16 treesize of output 12 [2024-01-31 16:41:11,107 INFO L349 Elim1Store]: treesize reduction 8, result has 70.4 percent of original size [2024-01-31 16:41:11,108 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 107 treesize of output 94 [2024-01-31 16:41:11,236 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:41:11,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987065697] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:41:11,237 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:41:11,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 25 [2024-01-31 16:41:11,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812100059] [2024-01-31 16:41:11,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:41:11,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-01-31 16:41:11,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:41:11,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-01-31 16:41:11,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2024-01-31 16:41:11,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 39 [2024-01-31 16:41:11,249 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 151 transitions, 1463 flow. Second operand has 26 states, 26 states have (on average 12.115384615384615) internal successors, (315), 26 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:41:11,249 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:41:11,249 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 39 [2024-01-31 16:41:11,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:41:18,670 INFO L124 PetriNetUnfolderBase]: 17606/35530 cut-off events. [2024-01-31 16:41:18,670 INFO L125 PetriNetUnfolderBase]: For 158197/158296 co-relation queries the response was YES. [2024-01-31 16:41:18,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133604 conditions, 35530 events. 17606/35530 cut-off events. For 158197/158296 co-relation queries the response was YES. Maximal size of possible extension queue 559. Compared 298393 event pairs, 2567 based on Foata normal form. 312/35837 useless extension candidates. Maximal degree in co-relation 112414. Up to 5959 conditions per place. [2024-01-31 16:41:18,988 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 573 selfloop transitions, 208 changer transitions 39/827 dead transitions. [2024-01-31 16:41:18,988 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 827 transitions, 7625 flow [2024-01-31 16:41:18,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2024-01-31 16:41:18,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2024-01-31 16:41:18,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 921 transitions. [2024-01-31 16:41:18,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.502454991816694 [2024-01-31 16:41:18,997 INFO L175 Difference]: Start difference. First operand has 152 places, 151 transitions, 1463 flow. Second operand 47 states and 921 transitions. [2024-01-31 16:41:18,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 827 transitions, 7625 flow [2024-01-31 16:41:19,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 827 transitions, 7451 flow, removed 69 selfloop flow, removed 5 redundant places. [2024-01-31 16:41:19,421 INFO L231 Difference]: Finished difference. Result has 219 places, 284 transitions, 3481 flow [2024-01-31 16:41:19,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1388, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=3481, PETRI_PLACES=219, PETRI_TRANSITIONS=284} [2024-01-31 16:41:19,422 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 182 predicate places. [2024-01-31 16:41:19,422 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 284 transitions, 3481 flow [2024-01-31 16:41:19,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 12.115384615384615) internal successors, (315), 26 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:41:19,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:41:19,423 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1] [2024-01-31 16:41:19,434 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-01-31 16:41:19,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:41:19,630 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t1Err1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 8 more)] === [2024-01-31 16:41:19,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:41:19,630 INFO L85 PathProgramCache]: Analyzing trace with hash -283823255, now seen corresponding path program 2 times [2024-01-31 16:41:19,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:41:19,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565748903] [2024-01-31 16:41:19,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:41:19,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:41:19,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:41:19,924 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:41:19,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:41:19,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565748903] [2024-01-31 16:41:19,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565748903] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:41:19,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353586747] [2024-01-31 16:41:19,925 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 16:41:19,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:41:19,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:41:19,942 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:41:19,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-01-31 16:41:20,097 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 16:41:20,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:41:20,099 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 11 conjunts are in the unsatisfiable core [2024-01-31 16:41:20,103 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:41:20,114 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 [2024-01-31 16:41:20,141 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 [2024-01-31 16:41:20,170 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 [2024-01-31 16:41:20,192 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 [2024-01-31 16:41:20,222 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:41:20,222 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:41:20,476 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:41:20,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353586747] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:41:20,477 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:41:20,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 20 [2024-01-31 16:41:20,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115673830] [2024-01-31 16:41:20,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:41:20,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-01-31 16:41:20,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:41:20,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-01-31 16:41:20,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=298, Unknown=0, NotChecked=0, Total=420 [2024-01-31 16:41:20,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 39 [2024-01-31 16:41:20,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 284 transitions, 3481 flow. Second operand has 21 states, 21 states have (on average 13.19047619047619) internal successors, (277), 21 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:41:20,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:41:20,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 39 [2024-01-31 16:41:20,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:41:31,862 INFO L124 PetriNetUnfolderBase]: 26863/53760 cut-off events. [2024-01-31 16:41:31,862 INFO L125 PetriNetUnfolderBase]: For 551104/551260 co-relation queries the response was YES. [2024-01-31 16:41:32,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 239817 conditions, 53760 events. 26863/53760 cut-off events. For 551104/551260 co-relation queries the response was YES. Maximal size of possible extension queue 921. Compared 484079 event pairs, 4411 based on Foata normal form. 342/54097 useless extension candidates. Maximal degree in co-relation 231717. Up to 9102 conditions per place. [2024-01-31 16:41:32,683 INFO L140 encePairwiseOnDemand]: 33/39 looper letters, 577 selfloop transitions, 347 changer transitions 3/934 dead transitions. [2024-01-31 16:41:32,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 934 transitions, 11289 flow [2024-01-31 16:41:32,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-01-31 16:41:32,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2024-01-31 16:41:32,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 709 transitions. [2024-01-31 16:41:32,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5508935508935509 [2024-01-31 16:41:32,685 INFO L175 Difference]: Start difference. First operand has 219 places, 284 transitions, 3481 flow. Second operand 33 states and 709 transitions. [2024-01-31 16:41:32,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 934 transitions, 11289 flow [2024-01-31 16:41:34,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 934 transitions, 10842 flow, removed 175 selfloop flow, removed 4 redundant places. [2024-01-31 16:41:34,053 INFO L231 Difference]: Finished difference. Result has 258 places, 462 transitions, 6455 flow [2024-01-31 16:41:34,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=3255, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=186, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=6455, PETRI_PLACES=258, PETRI_TRANSITIONS=462} [2024-01-31 16:41:34,054 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 221 predicate places. [2024-01-31 16:41:34,054 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 462 transitions, 6455 flow [2024-01-31 16:41:34,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 13.19047619047619) internal successors, (277), 21 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:41:34,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:41:34,054 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:41:34,066 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-01-31 16:41:34,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:41:34,255 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t2Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 8 more)] === [2024-01-31 16:41:34,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:41:34,255 INFO L85 PathProgramCache]: Analyzing trace with hash 842181925, now seen corresponding path program 2 times [2024-01-31 16:41:34,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:41:34,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655334774] [2024-01-31 16:41:34,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:41:34,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:41:34,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:41:34,481 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:41:34,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:41:34,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655334774] [2024-01-31 16:41:34,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655334774] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:41:34,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694510711] [2024-01-31 16:41:34,482 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 16:41:34,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:41:34,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:41:34,483 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:41:34,484 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-01-31 16:41:34,627 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 16:41:34,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:41:34,629 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 28 conjunts are in the unsatisfiable core [2024-01-31 16:41:34,634 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:41:34,938 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:41:34,938 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:41:36,319 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:41:36,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694510711] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:41:36,319 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:41:36,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 8] total 22 [2024-01-31 16:41:36,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214314083] [2024-01-31 16:41:36,320 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:41:36,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-01-31 16:41:36,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:41:36,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-01-31 16:41:36,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2024-01-31 16:41:36,456 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 39 [2024-01-31 16:41:36,457 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 462 transitions, 6455 flow. Second operand has 23 states, 23 states have (on average 12.869565217391305) internal successors, (296), 23 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:41:36,457 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:41:36,457 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 39 [2024-01-31 16:41:36,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand