./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread/fib_safe-12.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/fib_safe-12.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/fib_safe-12.i ./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/fib_safe-12.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 16:40:40,951 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-31 16:40:41,035 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-31 16:40:41,042 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-31 16:40:41,043 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-31 16:40:41,066 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-31 16:40:41,067 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-31 16:40:41,067 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-31 16:40:41,068 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-31 16:40:41,068 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-31 16:40:41,069 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-31 16:40:41,069 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-31 16:40:41,070 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-31 16:40:41,070 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-31 16:40:41,070 INFO L153 SettingsManager]: * Use SBE=true [2024-01-31 16:40:41,071 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-31 16:40:41,071 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-31 16:40:41,071 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-31 16:40:41,072 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-31 16:40:41,072 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-31 16:40:41,072 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-31 16:40:41,077 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-31 16:40:41,077 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-31 16:40:41,078 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-31 16:40:41,078 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-31 16:40:41,078 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-31 16:40:41,079 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-31 16:40:41,079 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-31 16:40:41,079 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-31 16:40:41,083 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-31 16:40:41,084 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-31 16:40:41,084 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-31 16:40:41,084 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-31 16:40:41,085 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-31 16:40:41,085 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-31 16:40:41,085 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-31 16:40:41,085 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-31 16:40:41,086 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-31 16:40:41,086 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-31 16:40:41,086 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-31 16:40:41,086 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-31 16:40:41,087 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-31 16:40:41,088 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-31 16:40:41,088 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-01-31 16:40:41,358 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-31 16:40:41,386 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-31 16:40:41,388 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-31 16:40:41,389 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-01-31 16:40:41,390 INFO L274 PluginConnector]: Witness Parser initialized [2024-01-31 16:40:41,391 INFO L431 ainManager$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/fib_safe-12.yml/witness.yml [2024-01-31 16:40:41,589 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-31 16:40:41,590 INFO L274 PluginConnector]: CDTParser initialized [2024-01-31 16:40:41,591 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_safe-12.i [2024-01-31 16:40:42,667 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-31 16:40:42,983 INFO L384 CDTParser]: Found 1 translation units. [2024-01-31 16:40:42,984 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_safe-12.i [2024-01-31 16:40:42,996 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a9923aeb/3138df07c2984558b8203e3abb6ebb8a/FLAGb69b14cfa [2024-01-31 16:40:43,016 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a9923aeb/3138df07c2984558b8203e3abb6ebb8a [2024-01-31 16:40:43,016 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-31 16:40:43,018 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-01-31 16:40:43,020 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-31 16:40:43,020 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-31 16:40:43,024 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-31 16:40:43,025 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 04:40:41" (1/2) ... [2024-01-31 16:40:43,026 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c91b8cf and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:40:43, skipping insertion in model container [2024-01-31 16:40:43,026 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 04:40:41" (1/2) ... [2024-01-31 16:40:43,027 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5b0a968f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:40:43, skipping insertion in model container [2024-01-31 16:40:43,028 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 04:40:43" (2/2) ... [2024-01-31 16:40:43,028 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c91b8cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:40:43, skipping insertion in model container [2024-01-31 16:40:43,029 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 04:40:43" (2/2) ... [2024-01-31 16:40:43,029 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-01-31 16:40:43,165 INFO L96 nessWitnessExtractor]: Found the following entries in the witness: [2024-01-31 16:40:43,167 INFO L98 nessWitnessExtractor]: Location invariant after [L681-L681] expression == 1 [2024-01-31 16:40:43,167 INFO L98 nessWitnessExtractor]: Location invariant before [L681-L681] expression == 0 [2024-01-31 16:40:43,167 INFO L98 nessWitnessExtractor]: Location invariant after [L724-L724] ((((1 <= i) && (1 <= j)) && (1 <= correct)) && (correct != 0)) && (assert_cond == (_Bool)0 || assert_cond == (_Bool)1) [2024-01-31 16:40:43,167 INFO L98 nessWitnessExtractor]: Location invariant after [L722-L722] assert_cond == (_Bool)0 || assert_cond == (_Bool)1 [2024-01-31 16:40:43,209 INFO L179 MainTranslator]: Built tables and reachable declarations [2024-01-31 16:40:43,506 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/fib_safe-12.i[30241,30254] [2024-01-31 16:40:43,529 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-31 16:40:43,547 INFO L204 MainTranslator]: Completed pre-run [2024-01-31 16:40:43,582 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/fib_safe-12.i[30241,30254] Start Parsing Local [2024-01-31 16:40:43,620 WARN L424 MainDispatcher]: Unable to annotate ; with a witness entry [2024-01-31 16:40:43,625 WARN L424 MainDispatcher]: Unable to annotate int with a witness entry [2024-01-31 16:40:43,628 WARN L424 MainDispatcher]: Unable to annotate _Bool with a witness entry [2024-01-31 16:40:43,632 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-31 16:40:43,659 INFO L208 MainTranslator]: Completed translation [2024-01-31 16:40:43,659 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:40:43 WrapperNode [2024-01-31 16:40:43,660 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-31 16:40:43,661 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-31 16:40:43,661 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-31 16:40:43,661 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-31 16:40:43,666 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:40:43" (1/1) ... [2024-01-31 16:40:43,676 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:40:43" (1/1) ... [2024-01-31 16:40:43,693 INFO L138 Inliner]: procedures = 165, calls = 28, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 75 [2024-01-31 16:40:43,694 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-31 16:40:43,695 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-31 16:40:43,695 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-31 16:40:43,696 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-31 16:40:43,705 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:40:43" (1/1) ... [2024-01-31 16:40:43,705 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:40:43" (1/1) ... [2024-01-31 16:40:43,721 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:40:43" (1/1) ... [2024-01-31 16:40:43,733 INFO L175 MemorySlicer]: Split 4 memory accesses to 3 slices as follows [2, 1, 1]. 50 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 2 writes are split as follows [0, 1, 1]. [2024-01-31 16:40:43,733 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:40:43" (1/1) ... [2024-01-31 16:40:43,733 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:40:43" (1/1) ... [2024-01-31 16:40:43,738 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:40:43" (1/1) ... [2024-01-31 16:40:43,741 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:40:43" (1/1) ... [2024-01-31 16:40:43,743 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:40:43" (1/1) ... [2024-01-31 16:40:43,746 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:40:43" (1/1) ... [2024-01-31 16:40:43,749 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-31 16:40:43,750 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-31 16:40:43,756 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-31 16:40:43,756 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-31 16:40:43,757 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:40:43" (1/1) ... [2024-01-31 16:40:43,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-31 16:40:43,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:40:43,786 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 16:40:43,794 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 16:40:43,820 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2024-01-31 16:40:43,820 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2024-01-31 16:40:43,820 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2024-01-31 16:40:43,821 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2024-01-31 16:40:43,821 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-31 16:40:43,821 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-31 16:40:43,821 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-31 16:40:43,821 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-01-31 16:40:43,821 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-31 16:40:43,822 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-31 16:40:43,822 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-31 16:40:43,822 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-31 16:40:43,822 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-31 16:40:43,822 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-31 16:40:43,822 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-01-31 16:40:43,823 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-31 16:40:43,823 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-31 16:40:43,824 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 16:40:43,935 INFO L244 CfgBuilder]: Building ICFG [2024-01-31 16:40:43,937 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-31 16:40:44,085 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-31 16:40:44,085 INFO L293 CfgBuilder]: Performing block encoding [2024-01-31 16:40:44,228 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-31 16:40:44,229 INFO L320 CfgBuilder]: Removed 3 assume(true) statements. [2024-01-31 16:40:44,230 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 04:40:44 BoogieIcfgContainer [2024-01-31 16:40:44,231 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-31 16:40:44,234 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-31 16:40:44,234 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-31 16:40:44,237 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-31 16:40:44,237 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 04:40:41" (1/4) ... [2024-01-31 16:40:44,238 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6680a609 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 31.01 04:40:44, skipping insertion in model container [2024-01-31 16:40:44,238 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 04:40:43" (2/4) ... [2024-01-31 16:40:44,238 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6680a609 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 04:40:44, skipping insertion in model container [2024-01-31 16:40:44,238 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:40:43" (3/4) ... [2024-01-31 16:40:44,240 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6680a609 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 04:40:44, skipping insertion in model container [2024-01-31 16:40:44,240 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 04:40:44" (4/4) ... [2024-01-31 16:40:44,241 INFO L112 eAbstractionObserver]: Analyzing ICFG fib_safe-12.i [2024-01-31 16:40:44,257 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-31 16:40:44,258 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-01-31 16:40:44,258 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-31 16:40:44,299 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-01-31 16:40:44,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 34 places, 31 transitions, 70 flow [2024-01-31 16:40:44,371 INFO L124 PetriNetUnfolderBase]: 4/29 cut-off events. [2024-01-31 16:40:44,371 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-31 16:40:44,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36 conditions, 29 events. 4/29 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 31 event pairs, 0 based on Foata normal form. 0/23 useless extension candidates. Maximal degree in co-relation 26. Up to 2 conditions per place. [2024-01-31 16:40:44,374 INFO L82 GeneralOperation]: Start removeDead. Operand has 34 places, 31 transitions, 70 flow [2024-01-31 16:40:44,376 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 32 places, 29 transitions, 64 flow [2024-01-31 16:40:44,384 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-31 16:40:44,391 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;@189e29b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-31 16:40:44,391 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-01-31 16:40:44,400 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-31 16:40:44,400 INFO L124 PetriNetUnfolderBase]: 3/24 cut-off events. [2024-01-31 16:40:44,401 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-31 16:40:44,401 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:40:44,401 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:40:44,403 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 16:40:44,409 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:40:44,409 INFO L85 PathProgramCache]: Analyzing trace with hash -1052799117, now seen corresponding path program 1 times [2024-01-31 16:40:44,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:40:44,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659981085] [2024-01-31 16:40:44,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:40:44,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:40:44,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:40:44,771 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 16:40:44,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:40:44,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659981085] [2024-01-31 16:40:44,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659981085] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:40:44,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:40:44,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 16:40:44,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413205358] [2024-01-31 16:40:44,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:40:44,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 16:40:44,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:40:44,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 16:40:44,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-31 16:40:44,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 31 [2024-01-31 16:40:44,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 29 transitions, 64 flow. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 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 16:40:44,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:40:44,821 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 31 [2024-01-31 16:40:44,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:40:44,936 INFO L124 PetriNetUnfolderBase]: 115/241 cut-off events. [2024-01-31 16:40:44,936 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-01-31 16:40:44,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 430 conditions, 241 events. 115/241 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 824 event pairs, 20 based on Foata normal form. 9/218 useless extension candidates. Maximal degree in co-relation 416. Up to 118 conditions per place. [2024-01-31 16:40:44,949 INFO L140 encePairwiseOnDemand]: 27/31 looper letters, 20 selfloop transitions, 2 changer transitions 1/35 dead transitions. [2024-01-31 16:40:44,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 35 transitions, 122 flow [2024-01-31 16:40:44,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 16:40:44,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 16:40:44,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 67 transitions. [2024-01-31 16:40:44,961 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7204301075268817 [2024-01-31 16:40:44,963 INFO L175 Difference]: Start difference. First operand has 32 places, 29 transitions, 64 flow. Second operand 3 states and 67 transitions. [2024-01-31 16:40:44,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 35 transitions, 122 flow [2024-01-31 16:40:44,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 35 transitions, 120 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-31 16:40:44,968 INFO L231 Difference]: Finished difference. Result has 33 places, 28 transitions, 70 flow [2024-01-31 16:40:44,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=70, PETRI_PLACES=33, PETRI_TRANSITIONS=28} [2024-01-31 16:40:44,974 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 1 predicate places. [2024-01-31 16:40:44,974 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 28 transitions, 70 flow [2024-01-31 16:40:44,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 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 16:40:44,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:40:44,975 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:40:44,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-31 16:40:44,976 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 16:40:44,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:40:44,978 INFO L85 PathProgramCache]: Analyzing trace with hash 1697611135, now seen corresponding path program 1 times [2024-01-31 16:40:44,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:40:44,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806049772] [2024-01-31 16:40:44,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:40:44,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:40:45,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:40:45,131 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:40:45,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:40:45,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806049772] [2024-01-31 16:40:45,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806049772] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:40:45,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942116099] [2024-01-31 16:40:45,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:40:45,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:40:45,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:40:45,135 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 16:40:45,151 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 16:40:45,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:40:45,249 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 3 conjunts are in the unsatisfiable core [2024-01-31 16:40:45,253 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:40:45,272 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 16:40:45,273 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-31 16:40:45,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942116099] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:40:45,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-01-31 16:40:45,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2024-01-31 16:40:45,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921842876] [2024-01-31 16:40:45,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:40:45,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 16:40:45,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:40:45,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 16:40:45,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-01-31 16:40:45,284 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 31 [2024-01-31 16:40:45,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 28 transitions, 70 flow. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 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 16:40:45,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:40:45,285 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 31 [2024-01-31 16:40:45,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:40:45,397 INFO L124 PetriNetUnfolderBase]: 151/259 cut-off events. [2024-01-31 16:40:45,397 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-01-31 16:40:45,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 539 conditions, 259 events. 151/259 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 709 event pairs, 68 based on Foata normal form. 0/233 useless extension candidates. Maximal degree in co-relation 524. Up to 178 conditions per place. [2024-01-31 16:40:45,403 INFO L140 encePairwiseOnDemand]: 29/31 looper letters, 23 selfloop transitions, 1 changer transitions 1/33 dead transitions. [2024-01-31 16:40:45,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 33 transitions, 130 flow [2024-01-31 16:40:45,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 16:40:45,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 16:40:45,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 55 transitions. [2024-01-31 16:40:45,406 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5913978494623656 [2024-01-31 16:40:45,406 INFO L175 Difference]: Start difference. First operand has 33 places, 28 transitions, 70 flow. Second operand 3 states and 55 transitions. [2024-01-31 16:40:45,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 33 transitions, 130 flow [2024-01-31 16:40:45,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 33 transitions, 128 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-31 16:40:45,410 INFO L231 Difference]: Finished difference. Result has 32 places, 26 transitions, 66 flow [2024-01-31 16:40:45,411 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=66, PETRI_PLACES=32, PETRI_TRANSITIONS=26} [2024-01-31 16:40:45,411 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 0 predicate places. [2024-01-31 16:40:45,411 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 26 transitions, 66 flow [2024-01-31 16:40:45,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 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 16:40:45,412 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:40:45,412 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:40:45,424 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-01-31 16:40:45,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:40:45,613 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 16:40:45,613 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:40:45,613 INFO L85 PathProgramCache]: Analyzing trace with hash 1086337880, now seen corresponding path program 1 times [2024-01-31 16:40:45,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:40:45,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644573978] [2024-01-31 16:40:45,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:40:45,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:40:45,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:40:45,679 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:40:45,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:40:45,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644573978] [2024-01-31 16:40:45,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644573978] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:40:45,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252764701] [2024-01-31 16:40:45,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:40:45,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:40:45,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:40:45,682 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 16:40:45,704 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 16:40:45,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:40:45,772 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 3 conjunts are in the unsatisfiable core [2024-01-31 16:40:45,775 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:40:45,811 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:40:45,811 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:40:45,835 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:40:45,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252764701] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:40:45,836 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:40:45,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-01-31 16:40:45,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554336734] [2024-01-31 16:40:45,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:40:45,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-31 16:40:45,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:40:45,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-31 16:40:45,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-01-31 16:40:45,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 31 [2024-01-31 16:40:45,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 26 transitions, 66 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 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 16:40:45,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:40:45,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 31 [2024-01-31 16:40:45,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:40:45,940 INFO L124 PetriNetUnfolderBase]: 151/277 cut-off events. [2024-01-31 16:40:45,941 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-01-31 16:40:45,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 584 conditions, 277 events. 151/277 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 771 event pairs, 20 based on Foata normal form. 0/263 useless extension candidates. Maximal degree in co-relation 569. Up to 91 conditions per place. [2024-01-31 16:40:45,946 INFO L140 encePairwiseOnDemand]: 28/31 looper letters, 38 selfloop transitions, 5 changer transitions 0/53 dead transitions. [2024-01-31 16:40:45,946 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 53 transitions, 212 flow [2024-01-31 16:40:45,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-31 16:40:45,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-31 16:40:45,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 130 transitions. [2024-01-31 16:40:45,953 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6989247311827957 [2024-01-31 16:40:45,953 INFO L175 Difference]: Start difference. First operand has 32 places, 26 transitions, 66 flow. Second operand 6 states and 130 transitions. [2024-01-31 16:40:45,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 53 transitions, 212 flow [2024-01-31 16:40:45,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 53 transitions, 211 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-31 16:40:45,956 INFO L231 Difference]: Finished difference. Result has 38 places, 29 transitions, 101 flow [2024-01-31 16:40:45,956 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=65, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=101, PETRI_PLACES=38, PETRI_TRANSITIONS=29} [2024-01-31 16:40:45,958 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 6 predicate places. [2024-01-31 16:40:45,958 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 29 transitions, 101 flow [2024-01-31 16:40:45,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 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 16:40:45,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:40:45,959 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:40:45,978 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 16:40:46,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2024-01-31 16:40:46,173 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 16:40:46,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:40:46,173 INFO L85 PathProgramCache]: Analyzing trace with hash 1699060964, now seen corresponding path program 2 times [2024-01-31 16:40:46,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:40:46,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729882918] [2024-01-31 16:40:46,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:40:46,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:40:46,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:40:46,302 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:40:46,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:40:46,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729882918] [2024-01-31 16:40:46,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729882918] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:40:46,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300206991] [2024-01-31 16:40:46,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 16:40:46,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:40:46,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:40:46,308 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 16:40:46,310 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 16:40:46,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 16:40:46,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:40:46,418 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-31 16:40:46,419 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:40:46,444 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:40:46,444 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:40:46,509 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:40:46,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300206991] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:40:46,510 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:40:46,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-01-31 16:40:46,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079104503] [2024-01-31 16:40:46,510 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:40:46,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-01-31 16:40:46,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:40:46,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-01-31 16:40:46,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-01-31 16:40:46,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 31 [2024-01-31 16:40:46,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 29 transitions, 101 flow. Second operand has 13 states, 13 states have (on average 15.538461538461538) internal successors, (202), 13 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:40:46,516 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:40:46,516 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 31 [2024-01-31 16:40:46,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:40:46,671 INFO L124 PetriNetUnfolderBase]: 259/439 cut-off events. [2024-01-31 16:40:46,671 INFO L125 PetriNetUnfolderBase]: For 207/207 co-relation queries the response was YES. [2024-01-31 16:40:46,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1119 conditions, 439 events. 259/439 cut-off events. For 207/207 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1170 event pairs, 20 based on Foata normal form. 54/488 useless extension candidates. Maximal degree in co-relation 1100. Up to 109 conditions per place. [2024-01-31 16:40:46,675 INFO L140 encePairwiseOnDemand]: 28/31 looper letters, 74 selfloop transitions, 11 changer transitions 0/95 dead transitions. [2024-01-31 16:40:46,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 95 transitions, 427 flow [2024-01-31 16:40:46,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-01-31 16:40:46,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-01-31 16:40:46,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 259 transitions. [2024-01-31 16:40:46,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.696236559139785 [2024-01-31 16:40:46,684 INFO L175 Difference]: Start difference. First operand has 38 places, 29 transitions, 101 flow. Second operand 12 states and 259 transitions. [2024-01-31 16:40:46,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 95 transitions, 427 flow [2024-01-31 16:40:46,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 95 transitions, 413 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-01-31 16:40:46,696 INFO L231 Difference]: Finished difference. Result has 54 places, 35 transitions, 171 flow [2024-01-31 16:40:46,696 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=87, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=171, PETRI_PLACES=54, PETRI_TRANSITIONS=35} [2024-01-31 16:40:46,697 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 22 predicate places. [2024-01-31 16:40:46,697 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 35 transitions, 171 flow [2024-01-31 16:40:46,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 15.538461538461538) internal successors, (202), 13 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:40:46,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:40:46,698 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:40:46,716 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 16:40:46,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:40:46,917 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 16:40:46,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:40:46,917 INFO L85 PathProgramCache]: Analyzing trace with hash -1349105564, now seen corresponding path program 3 times [2024-01-31 16:40:46,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:40:46,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345757823] [2024-01-31 16:40:46,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:40:46,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:40:46,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:40:47,120 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:40:47,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:40:47,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345757823] [2024-01-31 16:40:47,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345757823] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:40:47,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052087868] [2024-01-31 16:40:47,122 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 16:40:47,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:40:47,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:40:47,123 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 16:40:47,131 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 16:40:47,216 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-01-31 16:40:47,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:40:47,218 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 12 conjunts are in the unsatisfiable core [2024-01-31 16:40:47,220 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:40:47,246 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:40:47,246 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:40:47,464 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:40:47,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052087868] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:40:47,465 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:40:47,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2024-01-31 16:40:47,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269198438] [2024-01-31 16:40:47,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:40:47,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-01-31 16:40:47,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:40:47,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-01-31 16:40:47,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2024-01-31 16:40:47,468 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 31 [2024-01-31 16:40:47,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 35 transitions, 171 flow. Second operand has 25 states, 25 states have (on average 15.28) internal successors, (382), 25 states have internal predecessors, (382), 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 16:40:47,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:40:47,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 31 [2024-01-31 16:40:47,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:40:47,767 INFO L124 PetriNetUnfolderBase]: 475/763 cut-off events. [2024-01-31 16:40:47,767 INFO L125 PetriNetUnfolderBase]: For 4203/4203 co-relation queries the response was YES. [2024-01-31 16:40:47,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2251 conditions, 763 events. 475/763 cut-off events. For 4203/4203 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1967 event pairs, 20 based on Foata normal form. 108/866 useless extension candidates. Maximal degree in co-relation 2225. Up to 190 conditions per place. [2024-01-31 16:40:47,774 INFO L140 encePairwiseOnDemand]: 28/31 looper letters, 146 selfloop transitions, 23 changer transitions 0/179 dead transitions. [2024-01-31 16:40:47,775 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 179 transitions, 869 flow [2024-01-31 16:40:47,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-01-31 16:40:47,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-01-31 16:40:47,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 517 transitions. [2024-01-31 16:40:47,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6948924731182796 [2024-01-31 16:40:47,777 INFO L175 Difference]: Start difference. First operand has 54 places, 35 transitions, 171 flow. Second operand 24 states and 517 transitions. [2024-01-31 16:40:47,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 179 transitions, 869 flow [2024-01-31 16:40:47,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 179 transitions, 797 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-01-31 16:40:47,787 INFO L231 Difference]: Finished difference. Result has 84 places, 47 transitions, 291 flow [2024-01-31 16:40:47,787 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=123, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=291, PETRI_PLACES=84, PETRI_TRANSITIONS=47} [2024-01-31 16:40:47,789 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 52 predicate places. [2024-01-31 16:40:47,789 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 47 transitions, 291 flow [2024-01-31 16:40:47,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 15.28) internal successors, (382), 25 states have internal predecessors, (382), 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 16:40:47,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:40:47,790 INFO L208 CegarLoopForPetriNet]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:40:47,809 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 16:40:48,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:40:48,005 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 16:40:48,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:40:48,005 INFO L85 PathProgramCache]: Analyzing trace with hash 1405337444, now seen corresponding path program 4 times [2024-01-31 16:40:48,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:40:48,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274606980] [2024-01-31 16:40:48,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:40:48,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:40:48,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:40:48,572 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:40:48,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:40:48,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274606980] [2024-01-31 16:40:48,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274606980] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:40:48,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550871712] [2024-01-31 16:40:48,573 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 16:40:48,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:40:48,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:40:48,577 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 16:40:48,584 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 16:40:48,685 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 16:40:48,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:40:48,687 INFO L262 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 24 conjunts are in the unsatisfiable core [2024-01-31 16:40:48,689 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:40:48,747 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:40:48,747 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:40:49,137 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:40:49,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550871712] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:40:49,137 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:40:49,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 29 [2024-01-31 16:40:49,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273733014] [2024-01-31 16:40:49,138 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:40:49,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-01-31 16:40:49,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:40:49,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-01-31 16:40:49,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2024-01-31 16:40:49,141 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 31 [2024-01-31 16:40:49,141 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 47 transitions, 291 flow. Second operand has 29 states, 29 states have (on average 15.275862068965518) internal successors, (443), 29 states have internal predecessors, (443), 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 16:40:49,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:40:49,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 31 [2024-01-31 16:40:49,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:40:49,461 INFO L124 PetriNetUnfolderBase]: 547/871 cut-off events. [2024-01-31 16:40:49,461 INFO L125 PetriNetUnfolderBase]: For 9333/9333 co-relation queries the response was YES. [2024-01-31 16:40:49,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2695 conditions, 871 events. 547/871 cut-off events. For 9333/9333 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 2231 event pairs, 20 based on Foata normal form. 36/902 useless extension candidates. Maximal degree in co-relation 2657. Up to 184 conditions per place. [2024-01-31 16:40:49,470 INFO L140 encePairwiseOnDemand]: 28/31 looper letters, 170 selfloop transitions, 27 changer transitions 0/207 dead transitions. [2024-01-31 16:40:49,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 207 transitions, 1029 flow [2024-01-31 16:40:49,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-01-31 16:40:49,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-01-31 16:40:49,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 593 transitions. [2024-01-31 16:40:49,474 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6831797235023042 [2024-01-31 16:40:49,474 INFO L175 Difference]: Start difference. First operand has 84 places, 47 transitions, 291 flow. Second operand 28 states and 593 transitions. [2024-01-31 16:40:49,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 207 transitions, 1029 flow [2024-01-31 16:40:49,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 207 transitions, 925 flow, removed 41 selfloop flow, removed 11 redundant places. [2024-01-31 16:40:49,488 INFO L231 Difference]: Finished difference. Result has 104 places, 51 transitions, 291 flow [2024-01-31 16:40:49,489 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=195, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=291, PETRI_PLACES=104, PETRI_TRANSITIONS=51} [2024-01-31 16:40:49,491 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 72 predicate places. [2024-01-31 16:40:49,492 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 51 transitions, 291 flow [2024-01-31 16:40:49,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 15.275862068965518) internal successors, (443), 29 states have internal predecessors, (443), 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 16:40:49,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:40:49,493 INFO L208 CegarLoopForPetriNet]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:40:49,512 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 16:40:49,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:40:49,709 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 16:40:49,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:40:49,710 INFO L85 PathProgramCache]: Analyzing trace with hash -1550107548, now seen corresponding path program 5 times [2024-01-31 16:40:49,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:40:49,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289211269] [2024-01-31 16:40:49,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:40:49,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:40:49,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:40:51,808 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:40:51,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:40:51,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289211269] [2024-01-31 16:40:51,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289211269] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:40:51,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727237619] [2024-01-31 16:40:51,809 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 16:40:51,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:40:51,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:40:51,811 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 16:40:51,819 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 16:40:51,925 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2024-01-31 16:40:51,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:40:51,937 INFO L262 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 89 conjunts are in the unsatisfiable core [2024-01-31 16:40:51,943 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:40:53,824 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 300 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:40:53,824 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:40:55,738 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:40:55,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727237619] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:40:55,740 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:40:55,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 94 [2024-01-31 16:40:55,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098496136] [2024-01-31 16:40:55,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:40:55,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2024-01-31 16:40:55,742 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 95 interpolants. [2024-01-31 16:40:55,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1371, Invalid=7559, Unknown=0, NotChecked=0, Total=8930 [2024-01-31 16:40:56,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-01-31 16:40:56,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 51 transitions, 291 flow. Second operand has 95 states, 95 states have (on average 6.178947368421053) internal successors, (587), 95 states have internal predecessors, (587), 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 16:40:56,206 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:40:56,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-01-31 16:40:56,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:41:43,072 INFO L124 PetriNetUnfolderBase]: 40738/66207 cut-off events. [2024-01-31 16:41:43,072 INFO L125 PetriNetUnfolderBase]: For 240843/240843 co-relation queries the response was YES. [2024-01-31 16:41:43,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 182175 conditions, 66207 events. 40738/66207 cut-off events. For 240843/240843 co-relation queries the response was YES. Maximal size of possible extension queue 597. Compared 454047 event pairs, 82 based on Foata normal form. 549/66752 useless extension candidates. Maximal degree in co-relation 182131. Up to 8610 conditions per place. [2024-01-31 16:41:43,701 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 1085 selfloop transitions, 1701 changer transitions 761/3550 dead transitions. [2024-01-31 16:41:43,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 3550 transitions, 24606 flow [2024-01-31 16:41:43,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 254 states. [2024-01-31 16:41:43,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 254 states. [2024-01-31 16:41:43,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 3454 transitions. [2024-01-31 16:41:43,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43865887731775466 [2024-01-31 16:41:43,723 INFO L175 Difference]: Start difference. First operand has 104 places, 51 transitions, 291 flow. Second operand 254 states and 3454 transitions. [2024-01-31 16:41:43,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 3550 transitions, 24606 flow [2024-01-31 16:41:44,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 3550 transitions, 20568 flow, removed 754 selfloop flow, removed 23 redundant places. [2024-01-31 16:41:44,521 INFO L231 Difference]: Finished difference. Result has 452 places, 1855 transitions, 11223 flow [2024-01-31 16:41:44,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=219, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=254, PETRI_FLOW=11223, PETRI_PLACES=452, PETRI_TRANSITIONS=1855} [2024-01-31 16:41:44,523 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 420 predicate places. [2024-01-31 16:41:44,523 INFO L495 AbstractCegarLoop]: Abstraction has has 452 places, 1855 transitions, 11223 flow [2024-01-31 16:41:44,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 6.178947368421053) internal successors, (587), 95 states have internal predecessors, (587), 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 16:41:44,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:41:44,524 INFO L208 CegarLoopForPetriNet]: trace histogram [26, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:41:44,544 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 16:41:44,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:41:44,744 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 16:41:44,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:41:44,745 INFO L85 PathProgramCache]: Analyzing trace with hash -894316794, now seen corresponding path program 1 times [2024-01-31 16:41:44,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:41:44,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591941635] [2024-01-31 16:41:44,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:41:44,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:41:44,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:41:46,834 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 0 proven. 353 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:41:46,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:41:46,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591941635] [2024-01-31 16:41:46,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591941635] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:41:46,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372336244] [2024-01-31 16:41:46,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:41:46,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:41:46,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:41:46,837 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 16:41:46,838 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 16:41:46,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:41:46,975 INFO L262 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 91 conjunts are in the unsatisfiable core [2024-01-31 16:41:46,980 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:41:48,837 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 300 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:41:48,838 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:41:50,996 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 0 proven. 353 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:41:50,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372336244] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:41:50,996 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:41:50,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 102 [2024-01-31 16:41:50,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497703637] [2024-01-31 16:41:50,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:41:50,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2024-01-31 16:41:50,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:41:51,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2024-01-31 16:41:51,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1439, Invalid=9067, Unknown=0, NotChecked=0, Total=10506 [2024-01-31 16:41:51,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-01-31 16:41:51,061 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 452 places, 1855 transitions, 11223 flow. Second operand has 103 states, 103 states have (on average 6.223300970873787) internal successors, (641), 103 states have internal predecessors, (641), 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 16:41:51,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:41:51,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-01-31 16:41:51,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand