./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_21-deref_read_racing.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-02-07_10-47-16.files/SV-COMP24_unreach-call/28-race_reach_21-deref_read_racing.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7c74aec Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_21-deref_read_racing.i ./goblint.2024-02-07_10-47-16.files/SV-COMP24_unreach-call/28-race_reach_21-deref_read_racing.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --- Real Ultimate output --- This is Ultimate 0.2.4-wip.fs.fix-undeclared-acsl-variable-e7c74ae-m [2024-02-07 19:32:04,068 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-02-07 19:32:04,132 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-02-07 19:32:04,136 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-02-07 19:32:04,137 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-02-07 19:32:04,162 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-02-07 19:32:04,162 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-02-07 19:32:04,162 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-02-07 19:32:04,163 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-02-07 19:32:04,166 INFO L153 SettingsManager]: * Use memory slicer=true [2024-02-07 19:32:04,166 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-02-07 19:32:04,166 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-02-07 19:32:04,167 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-02-07 19:32:04,168 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-02-07 19:32:04,169 INFO L153 SettingsManager]: * Use SBE=true [2024-02-07 19:32:04,169 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-02-07 19:32:04,169 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-02-07 19:32:04,169 INFO L153 SettingsManager]: * sizeof long=4 [2024-02-07 19:32:04,169 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-02-07 19:32:04,170 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-02-07 19:32:04,170 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-02-07 19:32:04,170 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-02-07 19:32:04,170 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-02-07 19:32:04,171 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-02-07 19:32:04,171 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-02-07 19:32:04,171 INFO L153 SettingsManager]: * sizeof long double=12 [2024-02-07 19:32:04,171 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-02-07 19:32:04,171 INFO L153 SettingsManager]: * Use constant arrays=true [2024-02-07 19:32:04,172 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-02-07 19:32:04,172 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-02-07 19:32:04,173 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-02-07 19:32:04,173 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-02-07 19:32:04,173 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-07 19:32:04,173 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-02-07 19:32:04,174 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-02-07 19:32:04,174 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-02-07 19:32:04,174 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-02-07 19:32:04,174 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-02-07 19:32:04,174 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-02-07 19:32:04,174 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-02-07 19:32:04,175 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-02-07 19:32:04,175 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-02-07 19:32:04,175 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-02-07 19:32:04,175 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-02-07 19:32:04,381 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-02-07 19:32:04,404 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-02-07 19:32:04,407 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-02-07 19:32:04,408 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-02-07 19:32:04,408 INFO L274 PluginConnector]: Witness Parser initialized [2024-02-07 19:32:04,409 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-02-07_10-47-16.files/SV-COMP24_unreach-call/28-race_reach_21-deref_read_racing.yml/witness.yml [2024-02-07 19:32:04,501 INFO L270 PluginConnector]: Initializing CDTParser... [2024-02-07 19:32:04,502 INFO L274 PluginConnector]: CDTParser initialized [2024-02-07 19:32:04,503 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_21-deref_read_racing.i [2024-02-07 19:32:05,405 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-02-07 19:32:05,629 INFO L384 CDTParser]: Found 1 translation units. [2024-02-07 19:32:05,630 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_21-deref_read_racing.i [2024-02-07 19:32:05,656 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2262934d1/2fd35768c28f483f841e72bdad4172ec/FLAGa5715b5d8 [2024-02-07 19:32:05,674 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2262934d1/2fd35768c28f483f841e72bdad4172ec [2024-02-07 19:32:05,675 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-02-07 19:32:05,676 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-02-07 19:32:05,678 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-02-07 19:32:05,678 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-02-07 19:32:05,682 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-02-07 19:32:05,682 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 07:32:04" (1/2) ... [2024-02-07 19:32:05,683 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28a000af and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:32:05, skipping insertion in model container [2024-02-07 19:32:05,683 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 07:32:04" (1/2) ... [2024-02-07 19:32:05,685 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@c17a7dc and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:32:05, skipping insertion in model container [2024-02-07 19:32:05,685 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 07:32:05" (2/2) ... [2024-02-07 19:32:05,685 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28a000af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:32:05, skipping insertion in model container [2024-02-07 19:32:05,685 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 07:32:05" (2/2) ... [2024-02-07 19:32:05,686 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-02-07 19:32:05,722 INFO L74 edCorrectnessWitness]: Found the following entries in the witness: [2024-02-07 19:32:05,723 INFO L76 edCorrectnessWitness]: Location invariant before [L709-L709] q == 0 || (0 <= *q && q == & data) [2024-02-07 19:32:05,723 INFO L76 edCorrectnessWitness]: Location invariant before [L707-L707] ((((((((((((((((((((((((i == 19 || i == 18) || i == 17) || i == 16) || i == 15) || i == 14) || i == 13) || i == 12) || i == 11) || i == 10) || i == 9) || i == 8) || i == 7) || i == 6) || i == 5) || i == 4) || i == 3) || i == 2) || i == 1) || (0 == i && i == 0)) || (25 <= i && i <= 9999)) || i == 24) || i == 23) || i == 22) || i == 21) || i == 20 [2024-02-07 19:32:05,724 INFO L76 edCorrectnessWitness]: Location invariant after [L702-L702] ((1 <= data) && (1 <= *p)) && (p == & data) [2024-02-07 19:32:05,724 INFO L76 edCorrectnessWitness]: Location invariant after [L709-L709] (0 <= data) && (q == 0 || (q == & data && 0 <= *q)) [2024-02-07 19:32:05,724 INFO L76 edCorrectnessWitness]: Location invariant after [L707-L707] ((((((((((((((((((((((((i == 19 || i == 18) || i == 17) || i == 16) || i == 15) || i == 14) || i == 13) || i == 12) || i == 11) || i == 10) || i == 9) || i == 8) || i == 7) || i == 6) || i == 5) || i == 4) || i == 3) || i == 2) || i == 1) || (0 == i && i == 0)) || (25 <= i && i <= 9999)) || i == 24) || i == 23) || i == 22) || i == 21) || i == 20 [2024-02-07 19:32:05,724 INFO L76 edCorrectnessWitness]: Location invariant after [L702-L702] (0 <= data) && (data <= 2147483646) [2024-02-07 19:32:05,724 INFO L76 edCorrectnessWitness]: Location invariant before [L702-L702] ((1 <= data) && (1 <= *p)) && (p == & data) [2024-02-07 19:32:05,724 INFO L76 edCorrectnessWitness]: Location invariant before [L709-L709] (0 <= data) && (q == 0 || (q == & data && 0 <= *q)) [2024-02-07 19:32:05,724 INFO L76 edCorrectnessWitness]: Location invariant before [L702-L702] 1 <= data [2024-02-07 19:32:05,725 INFO L76 edCorrectnessWitness]: Location invariant before [L702-L702] (0 <= data) && (data <= 2147483646) [2024-02-07 19:32:05,725 INFO L76 edCorrectnessWitness]: Location invariant after [L702-L702] 1 <= data [2024-02-07 19:32:05,725 INFO L76 edCorrectnessWitness]: Location invariant before [L702-L702] ((0 <= data) && (0 <= *p)) && (p == & data) [2024-02-07 19:32:05,725 INFO L76 edCorrectnessWitness]: Location invariant after [L702-L702] ((0 <= data) && (0 <= *p)) && (p == & data) [2024-02-07 19:32:05,725 INFO L76 edCorrectnessWitness]: Location invariant before [L708-L708] (0 <= *p) && (p == & data) [2024-02-07 19:32:05,764 INFO L181 MainTranslator]: Built tables and reachable declarations [2024-02-07 19:32:06,017 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_21-deref_read_racing.i[30176,30189] [2024-02-07 19:32:06,041 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-02-07 19:32:06,057 INFO L206 MainTranslator]: Completed pre-run [2024-02-07 19:32:06,102 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_21-deref_read_racing.i[30176,30189] Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-02-07 19:32:06,148 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-02-07 19:32:06,180 INFO L211 MainTranslator]: Completed translation [2024-02-07 19:32:06,181 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:32:06 WrapperNode [2024-02-07 19:32:06,181 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-02-07 19:32:06,182 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-02-07 19:32:06,182 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-02-07 19:32:06,182 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-02-07 19:32:06,187 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:32:06" (1/1) ... [2024-02-07 19:32:06,207 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:32:06" (1/1) ... [2024-02-07 19:32:06,226 INFO L138 Inliner]: procedures = 171, calls = 50, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 81 [2024-02-07 19:32:06,226 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-02-07 19:32:06,227 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-02-07 19:32:06,227 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-02-07 19:32:06,227 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-02-07 19:32:06,235 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:32:06" (1/1) ... [2024-02-07 19:32:06,236 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:32:06" (1/1) ... [2024-02-07 19:32:06,249 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:32:06" (1/1) ... [2024-02-07 19:32:06,266 INFO L175 MemorySlicer]: Split 30 memory accesses to 5 slices as follows [2, 5, 5, 1, 17]. 57 percent of accesses are in the largest equivalence class. The 13 initializations are split as follows [2, 5, 5, 0, 1]. The 3 writes are split as follows [0, 0, 0, 1, 2]. [2024-02-07 19:32:06,266 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:32:06" (1/1) ... [2024-02-07 19:32:06,266 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:32:06" (1/1) ... [2024-02-07 19:32:06,272 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:32:06" (1/1) ... [2024-02-07 19:32:06,274 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:32:06" (1/1) ... [2024-02-07 19:32:06,277 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:32:06" (1/1) ... [2024-02-07 19:32:06,278 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:32:06" (1/1) ... [2024-02-07 19:32:06,281 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-02-07 19:32:06,281 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-02-07 19:32:06,282 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-02-07 19:32:06,282 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-02-07 19:32:06,282 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:32:06" (1/1) ... [2024-02-07 19:32:06,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-07 19:32:06,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:32:06,334 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-02-07 19:32:06,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-02-07 19:32:06,358 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-02-07 19:32:06,358 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-02-07 19:32:06,359 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-02-07 19:32:06,359 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-02-07 19:32:06,359 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-02-07 19:32:06,359 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-02-07 19:32:06,359 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-02-07 19:32:06,359 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-02-07 19:32:06,359 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-02-07 19:32:06,360 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-02-07 19:32:06,360 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-02-07 19:32:06,360 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-02-07 19:32:06,360 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-02-07 19:32:06,360 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2024-02-07 19:32:06,360 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2024-02-07 19:32:06,360 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-02-07 19:32:06,360 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-02-07 19:32:06,361 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-02-07 19:32:06,361 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-02-07 19:32:06,361 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-02-07 19:32:06,361 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-02-07 19:32:06,361 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-02-07 19:32:06,361 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-02-07 19:32:06,361 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-02-07 19:32:06,362 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-02-07 19:32:06,458 INFO L244 CfgBuilder]: Building ICFG [2024-02-07 19:32:06,460 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-02-07 19:32:06,685 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-02-07 19:32:06,686 INFO L293 CfgBuilder]: Performing block encoding [2024-02-07 19:32:06,824 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-02-07 19:32:06,824 INFO L320 CfgBuilder]: Removed 9 assume(true) statements. [2024-02-07 19:32:06,825 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.02 07:32:06 BoogieIcfgContainer [2024-02-07 19:32:06,826 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-02-07 19:32:06,829 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-02-07 19:32:06,829 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-02-07 19:32:06,831 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-02-07 19:32:06,832 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 07:32:04" (1/4) ... [2024-02-07 19:32:06,833 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2173a975 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 07.02 07:32:06, skipping insertion in model container [2024-02-07 19:32:06,833 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.02 07:32:05" (2/4) ... [2024-02-07 19:32:06,833 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2173a975 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 07:32:06, skipping insertion in model container [2024-02-07 19:32:06,834 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:32:06" (3/4) ... [2024-02-07 19:32:06,835 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2173a975 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 07:32:06, skipping insertion in model container [2024-02-07 19:32:06,835 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.02 07:32:06" (4/4) ... [2024-02-07 19:32:06,836 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_21-deref_read_racing.i [2024-02-07 19:32:06,849 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-02-07 19:32:06,850 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 9 error locations. [2024-02-07 19:32:06,850 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-02-07 19:32:06,891 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-02-07 19:32:06,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 53 places, 59 transitions, 122 flow [2024-02-07 19:32:06,952 INFO L124 PetriNetUnfolderBase]: 12/81 cut-off events. [2024-02-07 19:32:06,954 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-07 19:32:06,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85 conditions, 81 events. 12/81 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 256 event pairs, 0 based on Foata normal form. 0/54 useless extension candidates. Maximal degree in co-relation 56. Up to 4 conditions per place. [2024-02-07 19:32:06,958 INFO L82 GeneralOperation]: Start removeDead. Operand has 53 places, 59 transitions, 122 flow [2024-02-07 19:32:06,961 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 53 places, 59 transitions, 122 flow [2024-02-07 19:32:06,968 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-07 19:32:06,973 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;@1e4541bc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-07 19:32:06,973 INFO L358 AbstractCegarLoop]: Starting to check reachability of 14 error locations. [2024-02-07 19:32:06,976 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-07 19:32:06,977 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2024-02-07 19:32:06,977 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-07 19:32:06,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:32:06,977 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-02-07 19:32:06,978 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 11 more)] === [2024-02-07 19:32:06,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:32:06,982 INFO L85 PathProgramCache]: Analyzing trace with hash 368742, now seen corresponding path program 1 times [2024-02-07 19:32:06,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:32:06,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825896472] [2024-02-07 19:32:06,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:32:06,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:32:07,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:32:07,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:32:07,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:32:07,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825896472] [2024-02-07 19:32:07,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825896472] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:32:07,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:32:07,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-07 19:32:07,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289728841] [2024-02-07 19:32:07,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:32:07,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 19:32:07,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:32:07,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 19:32:07,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 19:32:07,268 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 59 [2024-02-07 19:32:07,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 59 transitions, 122 flow. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:32:07,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:32:07,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 59 [2024-02-07 19:32:07,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:32:07,457 INFO L124 PetriNetUnfolderBase]: 169/532 cut-off events. [2024-02-07 19:32:07,458 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-07 19:32:07,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 904 conditions, 532 events. 169/532 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 2750 event pairs, 144 based on Foata normal form. 97/590 useless extension candidates. Maximal degree in co-relation 890. Up to 352 conditions per place. [2024-02-07 19:32:07,465 INFO L140 encePairwiseOnDemand]: 47/59 looper letters, 40 selfloop transitions, 2 changer transitions 0/64 dead transitions. [2024-02-07 19:32:07,466 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 64 transitions, 216 flow [2024-02-07 19:32:07,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 19:32:07,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 19:32:07,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 124 transitions. [2024-02-07 19:32:07,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7005649717514124 [2024-02-07 19:32:07,479 INFO L175 Difference]: Start difference. First operand has 53 places, 59 transitions, 122 flow. Second operand 3 states and 124 transitions. [2024-02-07 19:32:07,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 64 transitions, 216 flow [2024-02-07 19:32:07,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 64 transitions, 216 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-02-07 19:32:07,489 INFO L231 Difference]: Finished difference. Result has 56 places, 50 transitions, 112 flow [2024-02-07 19:32:07,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=56, PETRI_TRANSITIONS=50} [2024-02-07 19:32:07,494 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 3 predicate places. [2024-02-07 19:32:07,494 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 50 transitions, 112 flow [2024-02-07 19:32:07,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:32:07,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:32:07,494 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-02-07 19:32:07,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-02-07 19:32:07,495 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 11 more)] === [2024-02-07 19:32:07,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:32:07,498 INFO L85 PathProgramCache]: Analyzing trace with hash 354408082, now seen corresponding path program 1 times [2024-02-07 19:32:07,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:32:07,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827058023] [2024-02-07 19:32:07,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:32:07,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:32:07,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:32:07,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:32:07,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:32:07,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827058023] [2024-02-07 19:32:07,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827058023] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:32:07,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:32:07,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-07 19:32:07,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936162056] [2024-02-07 19:32:07,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:32:07,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 19:32:07,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:32:07,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 19:32:07,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-07 19:32:07,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 59 [2024-02-07 19:32:07,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 50 transitions, 112 flow. Second operand has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:32:07,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:32:07,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 59 [2024-02-07 19:32:07,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:32:07,688 INFO L124 PetriNetUnfolderBase]: 39/139 cut-off events. [2024-02-07 19:32:07,691 INFO L125 PetriNetUnfolderBase]: For 24/24 co-relation queries the response was YES. [2024-02-07 19:32:07,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 272 conditions, 139 events. 39/139 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 384 event pairs, 24 based on Foata normal form. 14/152 useless extension candidates. Maximal degree in co-relation 255. Up to 81 conditions per place. [2024-02-07 19:32:07,693 INFO L140 encePairwiseOnDemand]: 55/59 looper letters, 30 selfloop transitions, 2 changer transitions 0/45 dead transitions. [2024-02-07 19:32:07,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 45 transitions, 164 flow [2024-02-07 19:32:07,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-07 19:32:07,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-07 19:32:07,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 122 transitions. [2024-02-07 19:32:07,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5169491525423728 [2024-02-07 19:32:07,697 INFO L175 Difference]: Start difference. First operand has 56 places, 50 transitions, 112 flow. Second operand 4 states and 122 transitions. [2024-02-07 19:32:07,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 45 transitions, 164 flow [2024-02-07 19:32:07,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 45 transitions, 158 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-02-07 19:32:07,700 INFO L231 Difference]: Finished difference. Result has 37 places, 31 transitions, 70 flow [2024-02-07 19:32:07,700 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=70, PETRI_PLACES=37, PETRI_TRANSITIONS=31} [2024-02-07 19:32:07,701 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, -16 predicate places. [2024-02-07 19:32:07,701 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 31 transitions, 70 flow [2024-02-07 19:32:07,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:32:07,701 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:32:07,701 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2024-02-07 19:32:07,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-02-07 19:32:07,702 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 11 more)] === [2024-02-07 19:32:07,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:32:07,704 INFO L85 PathProgramCache]: Analyzing trace with hash 1283761705, now seen corresponding path program 1 times [2024-02-07 19:32:07,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:32:07,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424069372] [2024-02-07 19:32:07,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:32:07,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:32:07,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-07 19:32:07,745 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-02-07 19:32:07,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-07 19:32:07,780 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-02-07 19:32:07,780 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-02-07 19:32:07,781 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (13 of 14 remaining) [2024-02-07 19:32:07,782 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (12 of 14 remaining) [2024-02-07 19:32:07,783 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (11 of 14 remaining) [2024-02-07 19:32:07,783 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (10 of 14 remaining) [2024-02-07 19:32:07,783 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT (9 of 14 remaining) [2024-02-07 19:32:07,783 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION (8 of 14 remaining) [2024-02-07 19:32:07,783 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONWITNESS_INVARIANT (7 of 14 remaining) [2024-02-07 19:32:07,784 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2ASSERT_VIOLATIONWITNESS_INVARIANT (6 of 14 remaining) [2024-02-07 19:32:07,784 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1ASSERT_VIOLATIONWITNESS_INVARIANT (5 of 14 remaining) [2024-02-07 19:32:07,785 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 14 remaining) [2024-02-07 19:32:07,790 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 14 remaining) [2024-02-07 19:32:07,790 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 14 remaining) [2024-02-07 19:32:07,790 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1ASSERT_VIOLATIONWITNESS_INVARIANT (1 of 14 remaining) [2024-02-07 19:32:07,790 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3ASSERT_VIOLATIONWITNESS_INVARIANT (0 of 14 remaining) [2024-02-07 19:32:07,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-02-07 19:32:07,791 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2024-02-07 19:32:07,793 WARN L234 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-02-07 19:32:07,793 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-02-07 19:32:07,814 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-02-07 19:32:07,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 81 places, 91 transitions, 192 flow [2024-02-07 19:32:07,825 INFO L124 PetriNetUnfolderBase]: 21/138 cut-off events. [2024-02-07 19:32:07,825 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-02-07 19:32:07,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 146 conditions, 138 events. 21/138 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 563 event pairs, 0 based on Foata normal form. 0/92 useless extension candidates. Maximal degree in co-relation 87. Up to 6 conditions per place. [2024-02-07 19:32:07,826 INFO L82 GeneralOperation]: Start removeDead. Operand has 81 places, 91 transitions, 192 flow [2024-02-07 19:32:07,827 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 81 places, 91 transitions, 192 flow [2024-02-07 19:32:07,828 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-07 19:32:07,828 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;@1e4541bc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-07 19:32:07,829 INFO L358 AbstractCegarLoop]: Starting to check reachability of 18 error locations. [2024-02-07 19:32:07,830 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-07 19:32:07,830 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2024-02-07 19:32:07,830 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-07 19:32:07,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:32:07,830 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-02-07 19:32:07,830 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 15 more)] === [2024-02-07 19:32:07,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:32:07,831 INFO L85 PathProgramCache]: Analyzing trace with hash 459105, now seen corresponding path program 1 times [2024-02-07 19:32:07,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:32:07,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306855377] [2024-02-07 19:32:07,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:32:07,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:32:07,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:32:07,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:32:07,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:32:07,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306855377] [2024-02-07 19:32:07,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306855377] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:32:07,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:32:07,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-07 19:32:07,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922477798] [2024-02-07 19:32:07,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:32:07,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 19:32:07,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:32:07,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 19:32:07,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 19:32:07,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 91 [2024-02-07 19:32:07,886 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 91 transitions, 192 flow. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:32:07,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:32:07,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 91 [2024-02-07 19:32:07,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:32:08,740 INFO L124 PetriNetUnfolderBase]: 5083/10417 cut-off events. [2024-02-07 19:32:08,740 INFO L125 PetriNetUnfolderBase]: For 56/56 co-relation queries the response was YES. [2024-02-07 19:32:08,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18490 conditions, 10417 events. 5083/10417 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 85930 event pairs, 2366 based on Foata normal form. 2210/12059 useless extension candidates. Maximal degree in co-relation 1281. Up to 8010 conditions per place. [2024-02-07 19:32:08,790 INFO L140 encePairwiseOnDemand]: 73/91 looper letters, 55 selfloop transitions, 2 changer transitions 0/91 dead transitions. [2024-02-07 19:32:08,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 91 transitions, 306 flow [2024-02-07 19:32:08,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 19:32:08,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 19:32:08,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 181 transitions. [2024-02-07 19:32:08,792 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.663003663003663 [2024-02-07 19:32:08,793 INFO L175 Difference]: Start difference. First operand has 81 places, 91 transitions, 192 flow. Second operand 3 states and 181 transitions. [2024-02-07 19:32:08,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 91 transitions, 306 flow [2024-02-07 19:32:08,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 91 transitions, 306 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-02-07 19:32:08,795 INFO L231 Difference]: Finished difference. Result has 84 places, 77 transitions, 174 flow [2024-02-07 19:32:08,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=174, PETRI_PLACES=84, PETRI_TRANSITIONS=77} [2024-02-07 19:32:08,796 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, 3 predicate places. [2024-02-07 19:32:08,796 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 77 transitions, 174 flow [2024-02-07 19:32:08,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:32:08,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:32:08,796 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-02-07 19:32:08,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-02-07 19:32:08,797 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 15 more)] === [2024-02-07 19:32:08,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:32:08,797 INFO L85 PathProgramCache]: Analyzing trace with hash 441279628, now seen corresponding path program 1 times [2024-02-07 19:32:08,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:32:08,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186690465] [2024-02-07 19:32:08,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:32:08,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:32:08,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:32:08,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:32:08,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:32:08,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186690465] [2024-02-07 19:32:08,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186690465] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:32:08,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:32:08,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-07 19:32:08,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038887029] [2024-02-07 19:32:08,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:32:08,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 19:32:08,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:32:08,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 19:32:08,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-07 19:32:08,843 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 91 [2024-02-07 19:32:08,844 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 77 transitions, 174 flow. Second operand has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:32:08,844 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:32:08,844 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 91 [2024-02-07 19:32:08,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:32:09,661 INFO L124 PetriNetUnfolderBase]: 4953/10077 cut-off events. [2024-02-07 19:32:09,662 INFO L125 PetriNetUnfolderBase]: For 405/405 co-relation queries the response was YES. [2024-02-07 19:32:09,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18303 conditions, 10077 events. 4953/10077 cut-off events. For 405/405 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 81812 event pairs, 2016 based on Foata normal form. 14/9737 useless extension candidates. Maximal degree in co-relation 1331. Up to 7281 conditions per place. [2024-02-07 19:32:09,704 INFO L140 encePairwiseOnDemand]: 87/91 looper letters, 82 selfloop transitions, 3 changer transitions 0/119 dead transitions. [2024-02-07 19:32:09,704 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 119 transitions, 428 flow [2024-02-07 19:32:09,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-07 19:32:09,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-07 19:32:09,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 223 transitions. [2024-02-07 19:32:09,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6126373626373627 [2024-02-07 19:32:09,706 INFO L175 Difference]: Start difference. First operand has 84 places, 77 transitions, 174 flow. Second operand 4 states and 223 transitions. [2024-02-07 19:32:09,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 119 transitions, 428 flow [2024-02-07 19:32:09,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 119 transitions, 426 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-07 19:32:09,708 INFO L231 Difference]: Finished difference. Result has 87 places, 77 transitions, 184 flow [2024-02-07 19:32:09,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=184, PETRI_PLACES=87, PETRI_TRANSITIONS=77} [2024-02-07 19:32:09,709 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, 6 predicate places. [2024-02-07 19:32:09,709 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 77 transitions, 184 flow [2024-02-07 19:32:09,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:32:09,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:32:09,710 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2024-02-07 19:32:09,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-02-07 19:32:09,710 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 15 more)] === [2024-02-07 19:32:09,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:32:09,710 INFO L85 PathProgramCache]: Analyzing trace with hash -1249827702, now seen corresponding path program 1 times [2024-02-07 19:32:09,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:32:09,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358773153] [2024-02-07 19:32:09,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:32:09,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:32:09,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:32:09,766 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:32:09,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:32:09,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358773153] [2024-02-07 19:32:09,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358773153] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 19:32:09,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707951523] [2024-02-07 19:32:09,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:32:09,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:32:09,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:32:09,821 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 19:32:09,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-02-07 19:32:09,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:32:09,902 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 11 conjunts are in the unsatisfiable core [2024-02-07 19:32:09,904 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 19:32:09,929 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:32:09,930 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 19:32:09,945 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:32:09,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707951523] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 19:32:09,946 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 19:32:09,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 3 [2024-02-07 19:32:09,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947768639] [2024-02-07 19:32:09,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 19:32:09,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-07 19:32:09,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:32:09,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-07 19:32:09,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-02-07 19:32:09,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 91 [2024-02-07 19:32:09,949 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 77 transitions, 184 flow. Second operand has 5 states, 5 states have (on average 35.8) internal successors, (179), 5 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:32:09,949 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:32:09,949 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 91 [2024-02-07 19:32:09,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:32:10,258 INFO L124 PetriNetUnfolderBase]: 1313/2548 cut-off events. [2024-02-07 19:32:10,259 INFO L125 PetriNetUnfolderBase]: For 1091/1091 co-relation queries the response was YES. [2024-02-07 19:32:10,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5372 conditions, 2548 events. 1313/2548 cut-off events. For 1091/1091 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 15953 event pairs, 192 based on Foata normal form. 392/2867 useless extension candidates. Maximal degree in co-relation 4126. Up to 1680 conditions per place. [2024-02-07 19:32:10,269 INFO L140 encePairwiseOnDemand]: 87/91 looper letters, 72 selfloop transitions, 3 changer transitions 0/100 dead transitions. [2024-02-07 19:32:10,269 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 100 transitions, 374 flow [2024-02-07 19:32:10,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-07 19:32:10,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-07 19:32:10,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 247 transitions. [2024-02-07 19:32:10,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5428571428571428 [2024-02-07 19:32:10,271 INFO L175 Difference]: Start difference. First operand has 87 places, 77 transitions, 184 flow. Second operand 5 states and 247 transitions. [2024-02-07 19:32:10,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 100 transitions, 374 flow [2024-02-07 19:32:10,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 100 transitions, 364 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-02-07 19:32:10,275 INFO L231 Difference]: Finished difference. Result has 68 places, 58 transitions, 136 flow [2024-02-07 19:32:10,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=136, PETRI_PLACES=68, PETRI_TRANSITIONS=58} [2024-02-07 19:32:10,275 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, -13 predicate places. [2024-02-07 19:32:10,276 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 58 transitions, 136 flow [2024-02-07 19:32:10,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 35.8) internal successors, (179), 5 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:32:10,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:32:10,276 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:32:10,290 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-02-07 19:32:10,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-02-07 19:32:10,489 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 15 more)] === [2024-02-07 19:32:10,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:32:10,489 INFO L85 PathProgramCache]: Analyzing trace with hash -102250636, now seen corresponding path program 1 times [2024-02-07 19:32:10,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:32:10,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032952602] [2024-02-07 19:32:10,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:32:10,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:32:10,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:32:10,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:32:10,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:32:10,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032952602] [2024-02-07 19:32:10,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032952602] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:32:10,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:32:10,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-07 19:32:10,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096203467] [2024-02-07 19:32:10,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:32:10,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 19:32:10,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:32:10,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 19:32:10,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-07 19:32:10,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 91 [2024-02-07 19:32:10,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 58 transitions, 136 flow. Second operand has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:32:10,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:32:10,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 91 [2024-02-07 19:32:10,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:32:10,886 INFO L124 PetriNetUnfolderBase]: 1445/3012 cut-off events. [2024-02-07 19:32:10,886 INFO L125 PetriNetUnfolderBase]: For 727/727 co-relation queries the response was YES. [2024-02-07 19:32:10,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5674 conditions, 3012 events. 1445/3012 cut-off events. For 727/727 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 19351 event pairs, 497 based on Foata normal form. 0/2935 useless extension candidates. Maximal degree in co-relation 4623. Up to 2123 conditions per place. [2024-02-07 19:32:10,897 INFO L140 encePairwiseOnDemand]: 86/91 looper letters, 63 selfloop transitions, 6 changer transitions 0/93 dead transitions. [2024-02-07 19:32:10,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 93 transitions, 371 flow [2024-02-07 19:32:10,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-07 19:32:10,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-07 19:32:10,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 238 transitions. [2024-02-07 19:32:10,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5230769230769231 [2024-02-07 19:32:10,899 INFO L175 Difference]: Start difference. First operand has 68 places, 58 transitions, 136 flow. Second operand 5 states and 238 transitions. [2024-02-07 19:32:10,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 93 transitions, 371 flow [2024-02-07 19:32:10,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 93 transitions, 359 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-02-07 19:32:10,902 INFO L231 Difference]: Finished difference. Result has 72 places, 63 transitions, 171 flow [2024-02-07 19:32:10,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=131, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=171, PETRI_PLACES=72, PETRI_TRANSITIONS=63} [2024-02-07 19:32:10,904 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, -9 predicate places. [2024-02-07 19:32:10,905 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 63 transitions, 171 flow [2024-02-07 19:32:10,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:32:10,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:32:10,906 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2024-02-07 19:32:10,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-02-07 19:32:10,906 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 15 more)] === [2024-02-07 19:32:10,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:32:10,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1506435488, now seen corresponding path program 1 times [2024-02-07 19:32:10,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:32:10,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666463035] [2024-02-07 19:32:10,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:32:10,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:32:10,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-07 19:32:10,923 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-02-07 19:32:10,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-07 19:32:10,940 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-02-07 19:32:10,940 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-02-07 19:32:10,941 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (17 of 18 remaining) [2024-02-07 19:32:10,941 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (16 of 18 remaining) [2024-02-07 19:32:10,941 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (15 of 18 remaining) [2024-02-07 19:32:10,942 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (14 of 18 remaining) [2024-02-07 19:32:10,943 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT (13 of 18 remaining) [2024-02-07 19:32:10,943 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION (12 of 18 remaining) [2024-02-07 19:32:10,943 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONWITNESS_INVARIANT (11 of 18 remaining) [2024-02-07 19:32:10,943 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2ASSERT_VIOLATIONWITNESS_INVARIANT (10 of 18 remaining) [2024-02-07 19:32:10,943 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1ASSERT_VIOLATIONWITNESS_INVARIANT (9 of 18 remaining) [2024-02-07 19:32:10,944 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3ASSERT_VIOLATIONWITNESS_INVARIANT (8 of 18 remaining) [2024-02-07 19:32:10,944 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONWITNESS_INVARIANT (7 of 18 remaining) [2024-02-07 19:32:10,944 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2ASSERT_VIOLATIONWITNESS_INVARIANT (6 of 18 remaining) [2024-02-07 19:32:10,944 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1ASSERT_VIOLATIONWITNESS_INVARIANT (5 of 18 remaining) [2024-02-07 19:32:10,944 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 18 remaining) [2024-02-07 19:32:10,944 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 18 remaining) [2024-02-07 19:32:10,945 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 18 remaining) [2024-02-07 19:32:10,945 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1ASSERT_VIOLATIONWITNESS_INVARIANT (1 of 18 remaining) [2024-02-07 19:32:10,945 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3ASSERT_VIOLATIONWITNESS_INVARIANT (0 of 18 remaining) [2024-02-07 19:32:10,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-02-07 19:32:10,945 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2024-02-07 19:32:10,947 WARN L234 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-02-07 19:32:10,947 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-02-07 19:32:10,978 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-02-07 19:32:10,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 109 places, 123 transitions, 264 flow [2024-02-07 19:32:10,996 INFO L124 PetriNetUnfolderBase]: 30/195 cut-off events. [2024-02-07 19:32:10,996 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-02-07 19:32:10,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 208 conditions, 195 events. 30/195 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 866 event pairs, 0 based on Foata normal form. 0/130 useless extension candidates. Maximal degree in co-relation 147. Up to 8 conditions per place. [2024-02-07 19:32:10,997 INFO L82 GeneralOperation]: Start removeDead. Operand has 109 places, 123 transitions, 264 flow [2024-02-07 19:32:10,999 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 109 places, 123 transitions, 264 flow [2024-02-07 19:32:11,000 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-07 19:32:11,000 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;@1e4541bc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-07 19:32:11,000 INFO L358 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2024-02-07 19:32:11,002 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-07 19:32:11,002 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2024-02-07 19:32:11,002 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-07 19:32:11,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:32:11,002 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-02-07 19:32:11,002 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 19 more)] === [2024-02-07 19:32:11,003 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:32:11,003 INFO L85 PathProgramCache]: Analyzing trace with hash 581244, now seen corresponding path program 1 times [2024-02-07 19:32:11,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:32:11,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215532866] [2024-02-07 19:32:11,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:32:11,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:32:11,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:32:11,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:32:11,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:32:11,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215532866] [2024-02-07 19:32:11,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215532866] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:32:11,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:32:11,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-07 19:32:11,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738624913] [2024-02-07 19:32:11,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:32:11,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 19:32:11,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:32:11,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 19:32:11,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 19:32:11,023 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 123 [2024-02-07 19:32:11,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 123 transitions, 264 flow. Second operand has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:32:11,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:32:11,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 123 [2024-02-07 19:32:11,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:32:23,784 INFO L124 PetriNetUnfolderBase]: 109551/183149 cut-off events. [2024-02-07 19:32:23,784 INFO L125 PetriNetUnfolderBase]: For 1320/1320 co-relation queries the response was YES. [2024-02-07 19:32:24,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 334891 conditions, 183149 events. 109551/183149 cut-off events. For 1320/1320 co-relation queries the response was YES. Maximal size of possible extension queue 3909. Compared 1774817 event pairs, 109538 based on Foata normal form. 41504/216075 useless extension candidates. Maximal degree in co-relation 190764. Up to 150894 conditions per place. [2024-02-07 19:32:24,826 INFO L140 encePairwiseOnDemand]: 99/123 looper letters, 69 selfloop transitions, 2 changer transitions 0/117 dead transitions. [2024-02-07 19:32:24,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 117 transitions, 394 flow [2024-02-07 19:32:24,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 19:32:24,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 19:32:24,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 237 transitions. [2024-02-07 19:32:24,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6422764227642277 [2024-02-07 19:32:24,828 INFO L175 Difference]: Start difference. First operand has 109 places, 123 transitions, 264 flow. Second operand 3 states and 237 transitions. [2024-02-07 19:32:24,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 117 transitions, 394 flow [2024-02-07 19:32:24,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 117 transitions, 392 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-02-07 19:32:24,833 INFO L231 Difference]: Finished difference. Result has 112 places, 103 transitions, 232 flow [2024-02-07 19:32:24,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=123, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=232, PETRI_PLACES=112, PETRI_TRANSITIONS=103} [2024-02-07 19:32:24,834 INFO L281 CegarLoopForPetriNet]: 109 programPoint places, 3 predicate places. [2024-02-07 19:32:24,835 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 103 transitions, 232 flow [2024-02-07 19:32:24,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:32:24,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:32:24,835 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-02-07 19:32:24,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-02-07 19:32:24,835 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 19 more)] === [2024-02-07 19:32:24,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:32:24,836 INFO L85 PathProgramCache]: Analyzing trace with hash 558688934, now seen corresponding path program 1 times [2024-02-07 19:32:24,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:32:24,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046413539] [2024-02-07 19:32:24,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:32:24,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:32:24,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:32:24,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:32:24,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:32:24,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046413539] [2024-02-07 19:32:24,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046413539] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:32:24,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:32:24,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-07 19:32:24,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817365035] [2024-02-07 19:32:24,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:32:24,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 19:32:24,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:32:24,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 19:32:24,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-07 19:32:24,887 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 123 [2024-02-07 19:32:24,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 103 transitions, 232 flow. Second operand has 4 states, 4 states have (on average 47.25) internal successors, (189), 4 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:32:24,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:32:24,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 123 [2024-02-07 19:32:24,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:32:37,330 INFO L124 PetriNetUnfolderBase]: 109421/183845 cut-off events. [2024-02-07 19:32:37,330 INFO L125 PetriNetUnfolderBase]: For 6593/6593 co-relation queries the response was YES. [2024-02-07 19:32:37,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 341032 conditions, 183845 events. 109421/183845 cut-off events. For 6593/6593 co-relation queries the response was YES. Maximal size of possible extension queue 3993. Compared 1803185 event pairs, 70980 based on Foata normal form. 14/178353 useless extension candidates. Maximal degree in co-relation 24775. Up to 150165 conditions per place. [2024-02-07 19:32:38,667 INFO L140 encePairwiseOnDemand]: 119/123 looper letters, 97 selfloop transitions, 3 changer transitions 0/146 dead transitions. [2024-02-07 19:32:38,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 146 transitions, 520 flow [2024-02-07 19:32:38,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-07 19:32:38,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-07 19:32:38,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 286 transitions. [2024-02-07 19:32:38,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5813008130081301 [2024-02-07 19:32:38,669 INFO L175 Difference]: Start difference. First operand has 112 places, 103 transitions, 232 flow. Second operand 4 states and 286 transitions. [2024-02-07 19:32:38,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 146 transitions, 520 flow [2024-02-07 19:32:38,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 146 transitions, 518 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-07 19:32:38,677 INFO L231 Difference]: Finished difference. Result has 115 places, 104 transitions, 248 flow [2024-02-07 19:32:38,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=123, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=248, PETRI_PLACES=115, PETRI_TRANSITIONS=104} [2024-02-07 19:32:38,677 INFO L281 CegarLoopForPetriNet]: 109 programPoint places, 6 predicate places. [2024-02-07 19:32:38,677 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 104 transitions, 248 flow [2024-02-07 19:32:38,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 47.25) internal successors, (189), 4 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:32:38,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:32:38,678 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2024-02-07 19:32:38,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-02-07 19:32:38,678 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 19 more)] === [2024-02-07 19:32:38,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:32:38,679 INFO L85 PathProgramCache]: Analyzing trace with hash -2030679869, now seen corresponding path program 1 times [2024-02-07 19:32:38,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:32:38,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082084399] [2024-02-07 19:32:38,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:32:38,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:32:38,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:32:38,729 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:32:38,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:32:38,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082084399] [2024-02-07 19:32:38,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082084399] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 19:32:38,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603116878] [2024-02-07 19:32:38,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:32:38,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:32:38,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:32:38,732 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 19:32:38,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-02-07 19:32:38,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:32:38,835 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 11 conjunts are in the unsatisfiable core [2024-02-07 19:32:38,836 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 19:32:38,850 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:32:38,851 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 19:32:38,865 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:32:38,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603116878] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 19:32:38,867 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 19:32:38,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 3 [2024-02-07 19:32:38,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462940700] [2024-02-07 19:32:38,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 19:32:38,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-07 19:32:38,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:32:38,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-07 19:32:38,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-02-07 19:32:38,870 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 123 [2024-02-07 19:32:38,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 104 transitions, 248 flow. Second operand has 5 states, 5 states have (on average 47.8) internal successors, (239), 5 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:32:38,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:32:38,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 123 [2024-02-07 19:32:38,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand