./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread/fib_unsafe-7.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/fib_unsafe-7.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7c74aec Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread/fib_unsafe-7.i ./goblint.2024-02-07_10-47-16.files/SV-COMP24_unreach-call/fib_unsafe-7.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --- Real Ultimate output --- This is Ultimate 0.2.4-wip.fs.fix-undeclared-acsl-variable-e7c74ae-m [2024-02-07 19:22:28,091 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-02-07 19:22:28,176 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-02-07 19:22:28,181 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-02-07 19:22:28,181 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-02-07 19:22:28,205 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-02-07 19:22:28,206 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-02-07 19:22:28,206 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-02-07 19:22:28,206 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-02-07 19:22:28,209 INFO L153 SettingsManager]: * Use memory slicer=true [2024-02-07 19:22:28,210 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-02-07 19:22:28,210 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-02-07 19:22:28,211 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-02-07 19:22:28,212 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-02-07 19:22:28,212 INFO L153 SettingsManager]: * Use SBE=true [2024-02-07 19:22:28,212 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-02-07 19:22:28,212 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-02-07 19:22:28,213 INFO L153 SettingsManager]: * sizeof long=4 [2024-02-07 19:22:28,213 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-02-07 19:22:28,213 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-02-07 19:22:28,213 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-02-07 19:22:28,213 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-02-07 19:22:28,214 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-02-07 19:22:28,214 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-02-07 19:22:28,214 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-02-07 19:22:28,214 INFO L153 SettingsManager]: * sizeof long double=12 [2024-02-07 19:22:28,215 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-02-07 19:22:28,215 INFO L153 SettingsManager]: * Use constant arrays=true [2024-02-07 19:22:28,215 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-02-07 19:22:28,215 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-02-07 19:22:28,216 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-02-07 19:22:28,216 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-02-07 19:22:28,217 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-07 19:22:28,217 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-02-07 19:22:28,217 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-02-07 19:22:28,217 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-02-07 19:22:28,217 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-02-07 19:22:28,217 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-02-07 19:22:28,218 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-02-07 19:22:28,218 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-02-07 19:22:28,218 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-02-07 19:22:28,218 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-02-07 19:22:28,218 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-02-07 19:22:28,219 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-02-07 19:22:28,416 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-02-07 19:22:28,437 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-02-07 19:22:28,439 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-02-07 19:22:28,439 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-02-07 19:22:28,440 INFO L274 PluginConnector]: Witness Parser initialized [2024-02-07 19:22:28,441 INFO L431 ainManager$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/fib_unsafe-7.yml/witness.yml [2024-02-07 19:22:28,497 INFO L270 PluginConnector]: Initializing CDTParser... [2024-02-07 19:22:28,497 INFO L274 PluginConnector]: CDTParser initialized [2024-02-07 19:22:28,497 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_unsafe-7.i [2024-02-07 19:22:29,475 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-02-07 19:22:29,668 INFO L384 CDTParser]: Found 1 translation units. [2024-02-07 19:22:29,669 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_unsafe-7.i [2024-02-07 19:22:29,688 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f4e0aa1a1/96787bfd7b7844849f2e2440f151552d/FLAGc646f6c91 [2024-02-07 19:22:29,701 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f4e0aa1a1/96787bfd7b7844849f2e2440f151552d [2024-02-07 19:22:29,701 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-02-07 19:22:29,702 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-02-07 19:22:29,704 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-02-07 19:22:29,704 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-02-07 19:22:29,708 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-02-07 19:22:29,708 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 07:22:28" (1/2) ... [2024-02-07 19:22:29,709 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28b32e90 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:22:29, skipping insertion in model container [2024-02-07 19:22:29,710 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 07:22:28" (1/2) ... [2024-02-07 19:22:29,711 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@b116792 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:22:29, skipping insertion in model container [2024-02-07 19:22:29,711 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 07:22:29" (2/2) ... [2024-02-07 19:22:29,711 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28b32e90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:22:29, skipping insertion in model container [2024-02-07 19:22:29,712 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 07:22:29" (2/2) ... [2024-02-07 19:22:29,712 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-02-07 19:22:29,755 INFO L74 edCorrectnessWitness]: Found the following entries in the witness: [2024-02-07 19:22:29,756 INFO L76 edCorrectnessWitness]: Location invariant before [L724-L724] ((((1 <= i) && (1 <= j)) && (2 <= correct)) && (i <= 2147483646)) && (correct != 0) [2024-02-07 19:22:29,756 INFO L76 edCorrectnessWitness]: Location invariant before [L710-L710] 0 <= prev [2024-02-07 19:22:29,756 INFO L76 edCorrectnessWitness]: Location invariant before [L698-L698] 2 <= j [2024-02-07 19:22:29,757 INFO L76 edCorrectnessWitness]: Location invariant before [L725-L725] assert_cond == (_Bool)0 || assert_cond == (_Bool)1 [2024-02-07 19:22:29,757 INFO L76 edCorrectnessWitness]: Location invariant before [L689-L689] (1 <= i) && (1 <= j) [2024-02-07 19:22:29,757 INFO L76 edCorrectnessWitness]: Location invariant before [L697-L697] (1 <= i) && (1 <= j) [2024-02-07 19:22:29,758 INFO L76 edCorrectnessWitness]: Location invariant before [L690-L690] 2 <= i [2024-02-07 19:22:29,758 INFO L76 edCorrectnessWitness]: Location invariant before [L706-L706] (0 <= cur) && (0 <= prev) [2024-02-07 19:22:29,758 INFO L76 edCorrectnessWitness]: Location invariant before [L708-L708] (0 <= prev) && (0 <= next) [2024-02-07 19:22:29,758 INFO L76 edCorrectnessWitness]: Location invariant before [L723-L723] 0 <= correct [2024-02-07 19:22:29,758 INFO L76 edCorrectnessWitness]: Location invariant before [L681-L681] ((0 <= expression) && (expression <= 1)) && (expression == 0 || expression == 1) [2024-02-07 19:22:29,758 INFO L76 edCorrectnessWitness]: Location invariant before [L719-L719] j == 1 [2024-02-07 19:22:29,758 INFO L76 edCorrectnessWitness]: Location invariant after [L724-L724] ((((1 <= i) && (1 <= j)) && (2 <= correct)) && (i <= 2147483646)) && (correct != 0) [2024-02-07 19:22:29,758 INFO L76 edCorrectnessWitness]: Location invariant before [L726-L726] assert_cond == (_Bool)0 || assert_cond == (_Bool)1 [2024-02-07 19:22:29,759 INFO L76 edCorrectnessWitness]: Location invariant before [L707-L707] (0 <= cur) && (0 <= next) [2024-02-07 19:22:29,759 INFO L76 edCorrectnessWitness]: Location invariant before [L716-L716] i == 1 [2024-02-07 19:22:29,799 INFO L181 MainTranslator]: Built tables and reachable declarations [2024-02-07 19:22:30,017 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_unsafe-7.i[30243,30256] [2024-02-07 19:22:30,034 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-02-07 19:22:30,040 INFO L206 MainTranslator]: Completed pre-run Start Parsing Local [2024-02-07 19:22:30,093 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_unsafe-7.i[30243,30256] Start Parsing Local Start Parsing Local Start Parsing Local 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 19:22:30,108 WARN L423 MainDispatcher]: Unable to annotate _Bool with a witness entry [2024-02-07 19:22:30,109 WARN L423 MainDispatcher]: Unable to annotate assert_cond = i < correct && j < correct with a witness entry Start Parsing Local Start Parsing Local [2024-02-07 19:22:30,113 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-02-07 19:22:30,147 INFO L211 MainTranslator]: Completed translation [2024-02-07 19:22:30,148 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:22:30 WrapperNode [2024-02-07 19:22:30,148 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-02-07 19:22:30,149 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-02-07 19:22:30,149 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-02-07 19:22:30,150 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-02-07 19:22:30,154 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:22:30" (1/1) ... [2024-02-07 19:22:30,179 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:22:30" (1/1) ... [2024-02-07 19:22:30,203 INFO L138 Inliner]: procedures = 165, calls = 28, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 84 [2024-02-07 19:22:30,204 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-02-07 19:22:30,205 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-02-07 19:22:30,205 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-02-07 19:22:30,206 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-02-07 19:22:30,214 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:22:30" (1/1) ... [2024-02-07 19:22:30,214 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:22:30" (1/1) ... [2024-02-07 19:22:30,225 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:22:30" (1/1) ... [2024-02-07 19:22:30,239 INFO L175 MemorySlicer]: Split 4 memory accesses to 3 slices as follows [2, 1, 1]. 50 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 2 writes are split as follows [0, 1, 1]. [2024-02-07 19:22:30,242 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:22:30" (1/1) ... [2024-02-07 19:22:30,242 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:22:30" (1/1) ... [2024-02-07 19:22:30,251 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:22:30" (1/1) ... [2024-02-07 19:22:30,256 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:22:30" (1/1) ... [2024-02-07 19:22:30,257 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:22:30" (1/1) ... [2024-02-07 19:22:30,261 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:22:30" (1/1) ... [2024-02-07 19:22:30,263 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-02-07 19:22:30,266 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-02-07 19:22:30,267 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-02-07 19:22:30,267 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-02-07 19:22:30,268 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:22:30" (1/1) ... [2024-02-07 19:22:30,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-07 19:22:30,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:22:30,290 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-02-07 19:22:30,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-02-07 19:22:30,319 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2024-02-07 19:22:30,320 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2024-02-07 19:22:30,320 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2024-02-07 19:22:30,320 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2024-02-07 19:22:30,320 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-02-07 19:22:30,320 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-02-07 19:22:30,320 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-02-07 19:22:30,321 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-02-07 19:22:30,321 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-02-07 19:22:30,321 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-02-07 19:22:30,321 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-02-07 19:22:30,321 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-02-07 19:22:30,321 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-02-07 19:22:30,321 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-02-07 19:22:30,322 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-02-07 19:22:30,322 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-02-07 19:22:30,322 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-02-07 19:22:30,323 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-02-07 19:22:30,449 INFO L244 CfgBuilder]: Building ICFG [2024-02-07 19:22:30,451 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-02-07 19:22:30,618 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-02-07 19:22:30,618 INFO L293 CfgBuilder]: Performing block encoding [2024-02-07 19:22:30,742 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-02-07 19:22:30,742 INFO L320 CfgBuilder]: Removed 3 assume(true) statements. [2024-02-07 19:22:30,743 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.02 07:22:30 BoogieIcfgContainer [2024-02-07 19:22:30,743 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-02-07 19:22:30,745 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-02-07 19:22:30,746 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-02-07 19:22:30,748 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-02-07 19:22:30,748 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 07:22:28" (1/4) ... [2024-02-07 19:22:30,749 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@373f6573 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 07.02 07:22:30, skipping insertion in model container [2024-02-07 19:22:30,749 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.02 07:22:29" (2/4) ... [2024-02-07 19:22:30,750 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@373f6573 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 07:22:30, skipping insertion in model container [2024-02-07 19:22:30,750 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:22:30" (3/4) ... [2024-02-07 19:22:30,750 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@373f6573 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 07:22:30, skipping insertion in model container [2024-02-07 19:22:30,750 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.02 07:22:30" (4/4) ... [2024-02-07 19:22:30,752 INFO L112 eAbstractionObserver]: Analyzing ICFG fib_unsafe-7.i [2024-02-07 19:22:30,766 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-02-07 19:22:30,766 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2024-02-07 19:22:30,766 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-02-07 19:22:30,811 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-02-07 19:22:30,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 49 transitions, 106 flow [2024-02-07 19:22:30,873 INFO L124 PetriNetUnfolderBase]: 4/47 cut-off events. [2024-02-07 19:22:30,875 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-07 19:22:30,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54 conditions, 47 events. 4/47 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 93 event pairs, 0 based on Foata normal form. 0/28 useless extension candidates. Maximal degree in co-relation 42. Up to 2 conditions per place. [2024-02-07 19:22:30,879 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 49 transitions, 106 flow [2024-02-07 19:22:30,882 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 50 places, 47 transitions, 100 flow [2024-02-07 19:22:30,894 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-07 19:22:30,901 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;@395d8c18, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-07 19:22:30,901 INFO L358 AbstractCegarLoop]: Starting to check reachability of 21 error locations. [2024-02-07 19:22:30,904 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-07 19:22:30,905 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2024-02-07 19:22:30,905 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-07 19:22:30,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:22:30,905 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2024-02-07 19:22:30,906 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 18 more)] === [2024-02-07 19:22:30,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:22:30,912 INFO L85 PathProgramCache]: Analyzing trace with hash 9963, now seen corresponding path program 1 times [2024-02-07 19:22:30,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:22:30,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498641818] [2024-02-07 19:22:30,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:22:30,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:22:30,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:22:31,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:22:31,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:22:31,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498641818] [2024-02-07 19:22:31,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498641818] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:22:31,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:22:31,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-02-07 19:22:31,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065405170] [2024-02-07 19:22:31,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:22:31,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-02-07 19:22:31,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:22:31,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-02-07 19:22:31,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-02-07 19:22:31,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-02-07 19:22:31,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 47 transitions, 100 flow. Second operand has 2 states, 2 states have (on average 18.0) internal successors, (36), 2 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:22:31,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:22:31,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-02-07 19:22:31,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:22:31,293 INFO L124 PetriNetUnfolderBase]: 461/1017 cut-off events. [2024-02-07 19:22:31,293 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-02-07 19:22:31,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1733 conditions, 1017 events. 461/1017 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 6574 event pairs, 344 based on Foata normal form. 25/864 useless extension candidates. Maximal degree in co-relation 1717. Up to 701 conditions per place. [2024-02-07 19:22:31,305 INFO L140 encePairwiseOnDemand]: 43/49 looper letters, 26 selfloop transitions, 0 changer transitions 0/41 dead transitions. [2024-02-07 19:22:31,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 41 transitions, 140 flow [2024-02-07 19:22:31,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-02-07 19:22:31,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-02-07 19:22:31,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 66 transitions. [2024-02-07 19:22:31,315 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.673469387755102 [2024-02-07 19:22:31,317 INFO L175 Difference]: Start difference. First operand has 50 places, 47 transitions, 100 flow. Second operand 2 states and 66 transitions. [2024-02-07 19:22:31,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 41 transitions, 140 flow [2024-02-07 19:22:31,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 41 transitions, 138 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-07 19:22:31,323 INFO L231 Difference]: Finished difference. Result has 44 places, 41 transitions, 86 flow [2024-02-07 19:22:31,325 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=86, PETRI_PLACES=44, PETRI_TRANSITIONS=41} [2024-02-07 19:22:31,329 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -6 predicate places. [2024-02-07 19:22:31,330 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 41 transitions, 86 flow [2024-02-07 19:22:31,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 18.0) internal successors, (36), 2 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:22:31,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:22:31,330 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:22:31,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-02-07 19:22:31,331 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 18 more)] === [2024-02-07 19:22:31,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:22:31,332 INFO L85 PathProgramCache]: Analyzing trace with hash -939968002, now seen corresponding path program 1 times [2024-02-07 19:22:31,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:22:31,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306523724] [2024-02-07 19:22:31,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:22:31,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:22:31,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:22:31,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:22:31,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:22:31,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306523724] [2024-02-07 19:22:31,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306523724] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:22:31,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:22:31,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-07 19:22:31,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285624412] [2024-02-07 19:22:31,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:22:31,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 19:22:31,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:22:31,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 19:22:31,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-07 19:22:31,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-02-07 19:22:31,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 41 transitions, 86 flow. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:22:31,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:22:31,540 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-02-07 19:22:31,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:22:31,744 INFO L124 PetriNetUnfolderBase]: 825/1417 cut-off events. [2024-02-07 19:22:31,744 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-07 19:22:31,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2684 conditions, 1417 events. 825/1417 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 7596 event pairs, 185 based on Foata normal form. 0/1228 useless extension candidates. Maximal degree in co-relation 2681. Up to 623 conditions per place. [2024-02-07 19:22:31,752 INFO L140 encePairwiseOnDemand]: 43/49 looper letters, 54 selfloop transitions, 5 changer transitions 0/74 dead transitions. [2024-02-07 19:22:31,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 74 transitions, 272 flow [2024-02-07 19:22:31,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-07 19:22:31,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-07 19:22:31,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 129 transitions. [2024-02-07 19:22:31,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6581632653061225 [2024-02-07 19:22:31,759 INFO L175 Difference]: Start difference. First operand has 44 places, 41 transitions, 86 flow. Second operand 4 states and 129 transitions. [2024-02-07 19:22:31,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 74 transitions, 272 flow [2024-02-07 19:22:31,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 74 transitions, 272 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-02-07 19:22:31,762 INFO L231 Difference]: Finished difference. Result has 48 places, 44 transitions, 113 flow [2024-02-07 19:22:31,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=113, PETRI_PLACES=48, PETRI_TRANSITIONS=44} [2024-02-07 19:22:31,763 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -2 predicate places. [2024-02-07 19:22:31,763 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 44 transitions, 113 flow [2024-02-07 19:22:31,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:22:31,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:22:31,764 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:22:31,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-02-07 19:22:31,764 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 18 more)] === [2024-02-07 19:22:31,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:22:31,765 INFO L85 PathProgramCache]: Analyzing trace with hash -1395258716, now seen corresponding path program 1 times [2024-02-07 19:22:31,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:22:31,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152257540] [2024-02-07 19:22:31,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:22:31,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:22:31,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:22:31,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:22:31,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:22:31,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152257540] [2024-02-07 19:22:31,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152257540] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:22:31,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:22:31,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-02-07 19:22:31,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435907980] [2024-02-07 19:22:31,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:22:31,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 19:22:31,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:22:31,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 19:22:31,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 19:22:31,864 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 49 [2024-02-07 19:22:31,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 44 transitions, 113 flow. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:22:31,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:22:31,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 49 [2024-02-07 19:22:31,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:22:32,072 INFO L124 PetriNetUnfolderBase]: 1635/3351 cut-off events. [2024-02-07 19:22:32,073 INFO L125 PetriNetUnfolderBase]: For 564/564 co-relation queries the response was YES. [2024-02-07 19:22:32,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6673 conditions, 3351 events. 1635/3351 cut-off events. For 564/564 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 24893 event pairs, 552 based on Foata normal form. 0/2848 useless extension candidates. Maximal degree in co-relation 6668. Up to 1396 conditions per place. [2024-02-07 19:22:32,086 INFO L140 encePairwiseOnDemand]: 45/49 looper letters, 49 selfloop transitions, 2 changer transitions 0/64 dead transitions. [2024-02-07 19:22:32,086 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 64 transitions, 271 flow [2024-02-07 19:22:32,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 19:22:32,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 19:22:32,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 92 transitions. [2024-02-07 19:22:32,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6258503401360545 [2024-02-07 19:22:32,088 INFO L175 Difference]: Start difference. First operand has 48 places, 44 transitions, 113 flow. Second operand 3 states and 92 transitions. [2024-02-07 19:22:32,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 64 transitions, 271 flow [2024-02-07 19:22:32,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 64 transitions, 271 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-02-07 19:22:32,090 INFO L231 Difference]: Finished difference. Result has 51 places, 45 transitions, 127 flow [2024-02-07 19:22:32,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=113, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=127, PETRI_PLACES=51, PETRI_TRANSITIONS=45} [2024-02-07 19:22:32,091 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 1 predicate places. [2024-02-07 19:22:32,091 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 45 transitions, 127 flow [2024-02-07 19:22:32,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:22:32,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:22:32,091 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:22:32,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-02-07 19:22:32,092 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 18 more)] === [2024-02-07 19:22:32,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:22:32,092 INFO L85 PathProgramCache]: Analyzing trace with hash -303346952, now seen corresponding path program 1 times [2024-02-07 19:22:32,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:22:32,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333522045] [2024-02-07 19:22:32,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:22:32,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:22:32,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:22:32,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:22:32,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:22:32,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333522045] [2024-02-07 19:22:32,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333522045] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:22:32,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:22:32,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-07 19:22:32,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550692391] [2024-02-07 19:22:32,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:22:32,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 19:22:32,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:22:32,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 19:22:32,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-07 19:22:32,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 49 [2024-02-07 19:22:32,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 45 transitions, 127 flow. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:22:32,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:22:32,170 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 49 [2024-02-07 19:22:32,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:22:32,409 INFO L124 PetriNetUnfolderBase]: 1815/3600 cut-off events. [2024-02-07 19:22:32,409 INFO L125 PetriNetUnfolderBase]: For 676/676 co-relation queries the response was YES. [2024-02-07 19:22:32,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7512 conditions, 3600 events. 1815/3600 cut-off events. For 676/676 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 26303 event pairs, 479 based on Foata normal form. 45/3216 useless extension candidates. Maximal degree in co-relation 7505. Up to 1531 conditions per place. [2024-02-07 19:22:32,424 INFO L140 encePairwiseOnDemand]: 44/49 looper letters, 75 selfloop transitions, 4 changer transitions 0/91 dead transitions. [2024-02-07 19:22:32,425 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 91 transitions, 425 flow [2024-02-07 19:22:32,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-07 19:22:32,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-07 19:22:32,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 138 transitions. [2024-02-07 19:22:32,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.563265306122449 [2024-02-07 19:22:32,429 INFO L175 Difference]: Start difference. First operand has 51 places, 45 transitions, 127 flow. Second operand 5 states and 138 transitions. [2024-02-07 19:22:32,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 91 transitions, 425 flow [2024-02-07 19:22:32,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 91 transitions, 423 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-07 19:22:32,432 INFO L231 Difference]: Finished difference. Result has 57 places, 47 transitions, 149 flow [2024-02-07 19:22:32,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=125, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=149, PETRI_PLACES=57, PETRI_TRANSITIONS=47} [2024-02-07 19:22:32,433 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 7 predicate places. [2024-02-07 19:22:32,433 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 47 transitions, 149 flow [2024-02-07 19:22:32,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:22:32,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:22:32,434 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:22:32,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-02-07 19:22:32,434 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 18 more)] === [2024-02-07 19:22:32,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:22:32,435 INFO L85 PathProgramCache]: Analyzing trace with hash -303346150, now seen corresponding path program 1 times [2024-02-07 19:22:32,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:22:32,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212433723] [2024-02-07 19:22:32,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:22:32,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:22:32,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:22:32,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:22:32,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:22:32,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212433723] [2024-02-07 19:22:32,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212433723] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:22:32,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:22:32,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-07 19:22:32,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316723087] [2024-02-07 19:22:32,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:22:32,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 19:22:32,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:22:32,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 19:22:32,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 19:22:32,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-02-07 19:22:32,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 47 transitions, 149 flow. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:22:32,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:22:32,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-02-07 19:22:32,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:22:32,629 INFO L124 PetriNetUnfolderBase]: 1095/2324 cut-off events. [2024-02-07 19:22:32,630 INFO L125 PetriNetUnfolderBase]: For 767/767 co-relation queries the response was YES. [2024-02-07 19:22:32,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5152 conditions, 2324 events. 1095/2324 cut-off events. For 767/767 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 16295 event pairs, 260 based on Foata normal form. 45/2129 useless extension candidates. Maximal degree in co-relation 5142. Up to 1126 conditions per place. [2024-02-07 19:22:32,640 INFO L140 encePairwiseOnDemand]: 46/49 looper letters, 43 selfloop transitions, 2 changer transitions 0/60 dead transitions. [2024-02-07 19:22:32,640 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 60 transitions, 281 flow [2024-02-07 19:22:32,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 19:22:32,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 19:22:32,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 91 transitions. [2024-02-07 19:22:32,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-02-07 19:22:32,641 INFO L175 Difference]: Start difference. First operand has 57 places, 47 transitions, 149 flow. Second operand 3 states and 91 transitions. [2024-02-07 19:22:32,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 60 transitions, 281 flow [2024-02-07 19:22:32,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 60 transitions, 275 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-02-07 19:22:32,644 INFO L231 Difference]: Finished difference. Result has 58 places, 47 transitions, 151 flow [2024-02-07 19:22:32,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=143, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=151, PETRI_PLACES=58, PETRI_TRANSITIONS=47} [2024-02-07 19:22:32,646 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 8 predicate places. [2024-02-07 19:22:32,646 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 47 transitions, 151 flow [2024-02-07 19:22:32,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:22:32,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:22:32,646 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:22:32,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-02-07 19:22:32,646 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 18 more)] === [2024-02-07 19:22:32,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:22:32,647 INFO L85 PathProgramCache]: Analyzing trace with hash 600376683, now seen corresponding path program 1 times [2024-02-07 19:22:32,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:22:32,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288374416] [2024-02-07 19:22:32,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:22:32,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:22:32,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:22:32,679 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:22:32,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:22:32,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288374416] [2024-02-07 19:22:32,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288374416] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:22:32,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:22:32,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-07 19:22:32,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422792731] [2024-02-07 19:22:32,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:22:32,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 19:22:32,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:22:32,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 19:22:32,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-07 19:22:32,681 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-02-07 19:22:32,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 47 transitions, 151 flow. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:22:32,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:22:32,681 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-02-07 19:22:32,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:22:32,830 INFO L124 PetriNetUnfolderBase]: 1213/2076 cut-off events. [2024-02-07 19:22:32,830 INFO L125 PetriNetUnfolderBase]: For 956/956 co-relation queries the response was YES. [2024-02-07 19:22:32,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5158 conditions, 2076 events. 1213/2076 cut-off events. For 956/956 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 11634 event pairs, 212 based on Foata normal form. 38/1984 useless extension candidates. Maximal degree in co-relation 5147. Up to 1227 conditions per place. [2024-02-07 19:22:32,841 INFO L140 encePairwiseOnDemand]: 44/49 looper letters, 63 selfloop transitions, 4 changer transitions 0/82 dead transitions. [2024-02-07 19:22:32,841 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 82 transitions, 405 flow [2024-02-07 19:22:32,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-07 19:22:32,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-07 19:22:32,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 127 transitions. [2024-02-07 19:22:32,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6479591836734694 [2024-02-07 19:22:32,842 INFO L175 Difference]: Start difference. First operand has 58 places, 47 transitions, 151 flow. Second operand 4 states and 127 transitions. [2024-02-07 19:22:32,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 82 transitions, 405 flow [2024-02-07 19:22:32,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 82 transitions, 397 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-07 19:22:32,845 INFO L231 Difference]: Finished difference. Result has 60 places, 48 transitions, 167 flow [2024-02-07 19:22:32,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=147, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=167, PETRI_PLACES=60, PETRI_TRANSITIONS=48} [2024-02-07 19:22:32,845 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 10 predicate places. [2024-02-07 19:22:32,846 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 48 transitions, 167 flow [2024-02-07 19:22:32,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:22:32,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:22:32,846 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:22:32,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-02-07 19:22:32,846 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 18 more)] === [2024-02-07 19:22:32,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:22:32,847 INFO L85 PathProgramCache]: Analyzing trace with hash -813820632, now seen corresponding path program 1 times [2024-02-07 19:22:32,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:22:32,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738212395] [2024-02-07 19:22:32,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:22:32,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:22:32,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:22:32,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:22:32,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:22:32,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738212395] [2024-02-07 19:22:32,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738212395] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:22:32,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:22:32,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-07 19:22:32,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977181264] [2024-02-07 19:22:32,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:22:32,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 19:22:32,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:22:32,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 19:22:32,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-07 19:22:32,898 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 49 [2024-02-07 19:22:32,898 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 48 transitions, 167 flow. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:22:32,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:22:32,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 49 [2024-02-07 19:22:32,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:22:33,190 INFO L124 PetriNetUnfolderBase]: 2113/4332 cut-off events. [2024-02-07 19:22:33,190 INFO L125 PetriNetUnfolderBase]: For 2344/2344 co-relation queries the response was YES. [2024-02-07 19:22:33,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10255 conditions, 4332 events. 2113/4332 cut-off events. For 2344/2344 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 32342 event pairs, 204 based on Foata normal form. 50/3855 useless extension candidates. Maximal degree in co-relation 10243. Up to 1551 conditions per place. [2024-02-07 19:22:33,211 INFO L140 encePairwiseOnDemand]: 44/49 looper letters, 80 selfloop transitions, 4 changer transitions 0/97 dead transitions. [2024-02-07 19:22:33,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 97 transitions, 535 flow [2024-02-07 19:22:33,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-07 19:22:33,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-07 19:22:33,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 145 transitions. [2024-02-07 19:22:33,212 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5918367346938775 [2024-02-07 19:22:33,212 INFO L175 Difference]: Start difference. First operand has 60 places, 48 transitions, 167 flow. Second operand 5 states and 145 transitions. [2024-02-07 19:22:33,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 97 transitions, 535 flow [2024-02-07 19:22:33,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 97 transitions, 509 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-02-07 19:22:33,216 INFO L231 Difference]: Finished difference. Result has 64 places, 49 transitions, 181 flow [2024-02-07 19:22:33,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=159, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=181, PETRI_PLACES=64, PETRI_TRANSITIONS=49} [2024-02-07 19:22:33,217 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 14 predicate places. [2024-02-07 19:22:33,217 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 49 transitions, 181 flow [2024-02-07 19:22:33,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:22:33,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:22:33,217 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:22:33,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-02-07 19:22:33,218 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 18 more)] === [2024-02-07 19:22:33,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:22:33,218 INFO L85 PathProgramCache]: Analyzing trace with hash 900956709, now seen corresponding path program 1 times [2024-02-07 19:22:33,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:22:33,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168696255] [2024-02-07 19:22:33,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:22:33,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:22:33,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:22:33,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:22:33,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:22:33,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168696255] [2024-02-07 19:22:33,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168696255] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:22:33,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:22:33,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-07 19:22:33,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814341736] [2024-02-07 19:22:33,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:22:33,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 19:22:33,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:22:33,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 19:22:33,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-07 19:22:33,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-02-07 19:22:33,253 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 49 transitions, 181 flow. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:22:33,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:22:33,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-02-07 19:22:33,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:22:33,454 INFO L124 PetriNetUnfolderBase]: 1647/2880 cut-off events. [2024-02-07 19:22:33,454 INFO L125 PetriNetUnfolderBase]: For 2184/2184 co-relation queries the response was YES. [2024-02-07 19:22:33,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7416 conditions, 2880 events. 1647/2880 cut-off events. For 2184/2184 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 17113 event pairs, 433 based on Foata normal form. 57/2800 useless extension candidates. Maximal degree in co-relation 7402. Up to 1555 conditions per place. [2024-02-07 19:22:33,465 INFO L140 encePairwiseOnDemand]: 44/49 looper letters, 66 selfloop transitions, 4 changer transitions 0/85 dead transitions. [2024-02-07 19:22:33,466 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 85 transitions, 467 flow [2024-02-07 19:22:33,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-07 19:22:33,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-07 19:22:33,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 127 transitions. [2024-02-07 19:22:33,467 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6479591836734694 [2024-02-07 19:22:33,467 INFO L175 Difference]: Start difference. First operand has 64 places, 49 transitions, 181 flow. Second operand 4 states and 127 transitions. [2024-02-07 19:22:33,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 85 transitions, 467 flow [2024-02-07 19:22:33,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 85 transitions, 453 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-02-07 19:22:33,469 INFO L231 Difference]: Finished difference. Result has 65 places, 49 transitions, 189 flow [2024-02-07 19:22:33,470 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=175, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=189, PETRI_PLACES=65, PETRI_TRANSITIONS=49} [2024-02-07 19:22:33,470 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 15 predicate places. [2024-02-07 19:22:33,470 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 49 transitions, 189 flow [2024-02-07 19:22:33,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:22:33,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:22:33,471 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:22:33,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-02-07 19:22:33,471 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 18 more)] === [2024-02-07 19:22:33,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:22:33,471 INFO L85 PathProgramCache]: Analyzing trace with hash -397569460, now seen corresponding path program 1 times [2024-02-07 19:22:33,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:22:33,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574404825] [2024-02-07 19:22:33,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:22:33,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:22:33,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:22:33,519 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:22:33,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:22:33,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574404825] [2024-02-07 19:22:33,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574404825] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 19:22:33,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510751939] [2024-02-07 19:22:33,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:22:33,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:22:33,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:22:33,537 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 19:22:33,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-02-07 19:22:33,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:22:33,600 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 6 conjunts are in the unsatisfiable core [2024-02-07 19:22:33,603 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 19:22:33,677 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-07 19:22:33,678 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-02-07 19:22:33,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510751939] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:22:33,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-02-07 19:22:33,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2024-02-07 19:22:33,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709765488] [2024-02-07 19:22:33,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:22:33,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 19:22:33,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:22:33,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 19:22:33,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-02-07 19:22:33,690 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 49 [2024-02-07 19:22:33,690 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 49 transitions, 189 flow. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:22:33,690 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:22:33,690 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 49 [2024-02-07 19:22:33,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:22:33,902 INFO L124 PetriNetUnfolderBase]: 1647/3425 cut-off events. [2024-02-07 19:22:33,903 INFO L125 PetriNetUnfolderBase]: For 2786/2786 co-relation queries the response was YES. [2024-02-07 19:22:33,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8333 conditions, 3425 events. 1647/3425 cut-off events. For 2786/2786 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 24140 event pairs, 106 based on Foata normal form. 129/3287 useless extension candidates. Maximal degree in co-relation 8318. Up to 2236 conditions per place. [2024-02-07 19:22:33,914 INFO L140 encePairwiseOnDemand]: 45/49 looper letters, 46 selfloop transitions, 2 changer transitions 0/61 dead transitions. [2024-02-07 19:22:33,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 61 transitions, 343 flow [2024-02-07 19:22:33,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-07 19:22:33,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-07 19:22:33,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 99 transitions. [2024-02-07 19:22:33,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5051020408163265 [2024-02-07 19:22:33,916 INFO L175 Difference]: Start difference. First operand has 65 places, 49 transitions, 189 flow. Second operand 4 states and 99 transitions. [2024-02-07 19:22:33,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 61 transitions, 343 flow [2024-02-07 19:22:33,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 61 transitions, 325 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-02-07 19:22:33,922 INFO L231 Difference]: Finished difference. Result has 63 places, 47 transitions, 173 flow [2024-02-07 19:22:33,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=169, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=173, PETRI_PLACES=63, PETRI_TRANSITIONS=47} [2024-02-07 19:22:33,923 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 13 predicate places. [2024-02-07 19:22:33,924 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 47 transitions, 173 flow [2024-02-07 19:22:33,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:22:33,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:22:33,924 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:22:33,938 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-02-07 19:22:34,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:22:34,135 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 18 more)] === [2024-02-07 19:22:34,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:22:34,136 INFO L85 PathProgramCache]: Analyzing trace with hash 560248912, now seen corresponding path program 1 times [2024-02-07 19:22:34,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:22:34,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686647960] [2024-02-07 19:22:34,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:22:34,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:22:34,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:22:34,178 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:22:34,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:22:34,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686647960] [2024-02-07 19:22:34,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686647960] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 19:22:34,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878678703] [2024-02-07 19:22:34,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:22:34,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:22:34,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:22:34,180 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 19:22:34,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-02-07 19:22:34,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:22:34,241 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 8 conjunts are in the unsatisfiable core [2024-02-07 19:22:34,242 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 19:22:34,334 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:22:34,334 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-02-07 19:22:34,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878678703] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:22:34,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-02-07 19:22:34,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [3] total 8 [2024-02-07 19:22:34,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257836084] [2024-02-07 19:22:34,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:22:34,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-07 19:22:34,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:22:34,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-07 19:22:34,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-02-07 19:22:34,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-02-07 19:22:34,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 47 transitions, 173 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 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 19:22:34,344 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:22:34,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-02-07 19:22:34,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:22:34,607 INFO L124 PetriNetUnfolderBase]: 1647/3296 cut-off events. [2024-02-07 19:22:34,607 INFO L125 PetriNetUnfolderBase]: For 2325/2325 co-relation queries the response was YES. [2024-02-07 19:22:34,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7901 conditions, 3296 events. 1647/3296 cut-off events. For 2325/2325 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 22095 event pairs, 106 based on Foata normal form. 129/3158 useless extension candidates. Maximal degree in co-relation 7886. Up to 1677 conditions per place. [2024-02-07 19:22:34,618 INFO L140 encePairwiseOnDemand]: 43/49 looper letters, 71 selfloop transitions, 5 changer transitions 0/87 dead transitions. [2024-02-07 19:22:34,619 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 87 transitions, 497 flow [2024-02-07 19:22:34,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-02-07 19:22:34,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-02-07 19:22:34,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 139 transitions. [2024-02-07 19:22:34,620 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47278911564625853 [2024-02-07 19:22:34,620 INFO L175 Difference]: Start difference. First operand has 63 places, 47 transitions, 173 flow. Second operand 6 states and 139 transitions. [2024-02-07 19:22:34,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 87 transitions, 497 flow [2024-02-07 19:22:34,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 87 transitions, 490 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-02-07 19:22:34,627 INFO L231 Difference]: Finished difference. Result has 62 places, 45 transitions, 168 flow [2024-02-07 19:22:34,627 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=168, PETRI_PLACES=62, PETRI_TRANSITIONS=45} [2024-02-07 19:22:34,628 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 12 predicate places. [2024-02-07 19:22:34,628 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 45 transitions, 168 flow [2024-02-07 19:22:34,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 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 19:22:34,629 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:22:34,629 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:22:34,646 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-02-07 19:22:34,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-02-07 19:22:34,841 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 18 more)] === [2024-02-07 19:22:34,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:22:34,842 INFO L85 PathProgramCache]: Analyzing trace with hash 560249714, now seen corresponding path program 1 times [2024-02-07 19:22:34,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:22:34,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816990841] [2024-02-07 19:22:34,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:22:34,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:22:34,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:22:34,879 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:22:34,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:22:34,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816990841] [2024-02-07 19:22:34,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816990841] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 19:22:34,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757726197] [2024-02-07 19:22:34,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:22:34,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:22:34,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:22:34,881 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 19:22:34,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-02-07 19:22:34,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:22:34,943 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 3 conjunts are in the unsatisfiable core [2024-02-07 19:22:34,945 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 19:22:34,955 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:22:34,956 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 19:22:34,973 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:22:34,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757726197] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 19:22:34,974 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 19:22:34,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-02-07 19:22:34,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664911345] [2024-02-07 19:22:34,974 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 19:22:34,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-07 19:22:34,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:22:34,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-07 19:22:34,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-02-07 19:22:34,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 49 [2024-02-07 19:22:34,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 45 transitions, 168 flow. Second operand has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:22:34,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:22:34,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 49 [2024-02-07 19:22:34,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:22:35,253 INFO L124 PetriNetUnfolderBase]: 1991/3388 cut-off events. [2024-02-07 19:22:35,253 INFO L125 PetriNetUnfolderBase]: For 2832/2832 co-relation queries the response was YES. [2024-02-07 19:22:35,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9213 conditions, 3388 events. 1991/3388 cut-off events. For 2832/2832 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 17460 event pairs, 313 based on Foata normal form. 129/3383 useless extension candidates. Maximal degree in co-relation 9200. Up to 775 conditions per place. [2024-02-07 19:22:35,264 INFO L140 encePairwiseOnDemand]: 45/49 looper letters, 94 selfloop transitions, 6 changer transitions 0/110 dead transitions. [2024-02-07 19:22:35,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 110 transitions, 646 flow [2024-02-07 19:22:35,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-02-07 19:22:35,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-02-07 19:22:35,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 179 transitions. [2024-02-07 19:22:35,266 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.608843537414966 [2024-02-07 19:22:35,266 INFO L175 Difference]: Start difference. First operand has 62 places, 45 transitions, 168 flow. Second operand 6 states and 179 transitions. [2024-02-07 19:22:35,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 110 transitions, 646 flow [2024-02-07 19:22:35,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 110 transitions, 625 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-02-07 19:22:35,271 INFO L231 Difference]: Finished difference. Result has 66 places, 48 transitions, 195 flow [2024-02-07 19:22:35,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=195, PETRI_PLACES=66, PETRI_TRANSITIONS=48} [2024-02-07 19:22:35,272 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 16 predicate places. [2024-02-07 19:22:35,272 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 48 transitions, 195 flow [2024-02-07 19:22:35,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:22:35,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:22:35,272 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:22:35,286 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-02-07 19:22:35,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:22:35,484 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 18 more)] === [2024-02-07 19:22:35,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:22:35,485 INFO L85 PathProgramCache]: Analyzing trace with hash -1018936604, now seen corresponding path program 1 times [2024-02-07 19:22:35,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:22:35,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307634184] [2024-02-07 19:22:35,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:22:35,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:22:35,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:22:35,518 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:22:35,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:22:35,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307634184] [2024-02-07 19:22:35,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307634184] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:22:35,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:22:35,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-07 19:22:35,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102435471] [2024-02-07 19:22:35,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:22:35,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 19:22:35,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:22:35,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 19:22:35,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-07 19:22:35,521 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-02-07 19:22:35,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 48 transitions, 195 flow. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:22:35,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:22:35,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-02-07 19:22:35,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:22:35,764 INFO L124 PetriNetUnfolderBase]: 2009/3483 cut-off events. [2024-02-07 19:22:35,764 INFO L125 PetriNetUnfolderBase]: For 4809/4809 co-relation queries the response was YES. [2024-02-07 19:22:35,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9789 conditions, 3483 events. 2009/3483 cut-off events. For 4809/4809 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 19256 event pairs, 557 based on Foata normal form. 133/3555 useless extension candidates. Maximal degree in co-relation 9775. Up to 1395 conditions per place. [2024-02-07 19:22:35,780 INFO L140 encePairwiseOnDemand]: 45/49 looper letters, 75 selfloop transitions, 4 changer transitions 0/91 dead transitions. [2024-02-07 19:22:35,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 91 transitions, 547 flow [2024-02-07 19:22:35,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-07 19:22:35,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-07 19:22:35,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 128 transitions. [2024-02-07 19:22:35,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6530612244897959 [2024-02-07 19:22:35,781 INFO L175 Difference]: Start difference. First operand has 66 places, 48 transitions, 195 flow. Second operand 4 states and 128 transitions. [2024-02-07 19:22:35,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 91 transitions, 547 flow [2024-02-07 19:22:35,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 91 transitions, 543 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-07 19:22:35,786 INFO L231 Difference]: Finished difference. Result has 70 places, 49 transitions, 219 flow [2024-02-07 19:22:35,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=193, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=219, PETRI_PLACES=70, PETRI_TRANSITIONS=49} [2024-02-07 19:22:35,787 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 20 predicate places. [2024-02-07 19:22:35,787 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 49 transitions, 219 flow [2024-02-07 19:22:35,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:22:35,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:22:35,787 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:22:35,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-02-07 19:22:35,788 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 18 more)] === [2024-02-07 19:22:35,788 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:22:35,788 INFO L85 PathProgramCache]: Analyzing trace with hash 1151039460, now seen corresponding path program 2 times [2024-02-07 19:22:35,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:22:35,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819060218] [2024-02-07 19:22:35,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:22:35,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:22:35,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:22:35,817 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:22:35,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:22:35,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819060218] [2024-02-07 19:22:35,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819060218] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:22:35,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:22:35,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-07 19:22:35,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362384275] [2024-02-07 19:22:35,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:22:35,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 19:22:35,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:22:35,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 19:22:35,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-07 19:22:35,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-02-07 19:22:35,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 49 transitions, 219 flow. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:22:35,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:22:35,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-02-07 19:22:35,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:22:36,057 INFO L124 PetriNetUnfolderBase]: 2029/3522 cut-off events. [2024-02-07 19:22:36,058 INFO L125 PetriNetUnfolderBase]: For 6210/6210 co-relation queries the response was YES. [2024-02-07 19:22:36,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9936 conditions, 3522 events. 2029/3522 cut-off events. For 6210/6210 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 19467 event pairs, 506 based on Foata normal form. 114/3573 useless extension candidates. Maximal degree in co-relation 9919. Up to 1122 conditions per place. [2024-02-07 19:22:36,073 INFO L140 encePairwiseOnDemand]: 45/49 looper letters, 69 selfloop transitions, 4 changer transitions 3/88 dead transitions. [2024-02-07 19:22:36,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 88 transitions, 537 flow [2024-02-07 19:22:36,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-07 19:22:36,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-07 19:22:36,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 124 transitions. [2024-02-07 19:22:36,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6326530612244898 [2024-02-07 19:22:36,075 INFO L175 Difference]: Start difference. First operand has 70 places, 49 transitions, 219 flow. Second operand 4 states and 124 transitions. [2024-02-07 19:22:36,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 88 transitions, 537 flow [2024-02-07 19:22:36,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 88 transitions, 525 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-02-07 19:22:36,083 INFO L231 Difference]: Finished difference. Result has 69 places, 47 transitions, 205 flow [2024-02-07 19:22:36,084 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=189, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=205, PETRI_PLACES=69, PETRI_TRANSITIONS=47} [2024-02-07 19:22:36,084 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 19 predicate places. [2024-02-07 19:22:36,084 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 47 transitions, 205 flow [2024-02-07 19:22:36,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:22:36,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:22:36,085 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:22:36,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-02-07 19:22:36,085 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 18 more)] === [2024-02-07 19:22:36,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:22:36,085 INFO L85 PathProgramCache]: Analyzing trace with hash 1195539322, now seen corresponding path program 2 times [2024-02-07 19:22:36,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:22:36,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149955679] [2024-02-07 19:22:36,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:22:36,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:22:36,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:22:36,121 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-02-07 19:22:36,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:22:36,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149955679] [2024-02-07 19:22:36,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149955679] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:22:36,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:22:36,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-07 19:22:36,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963877551] [2024-02-07 19:22:36,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:22:36,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 19:22:36,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:22:36,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 19:22:36,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-07 19:22:36,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 49 [2024-02-07 19:22:36,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 47 transitions, 205 flow. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:22:36,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:22:36,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 49 [2024-02-07 19:22:36,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:22:36,362 INFO L124 PetriNetUnfolderBase]: 2065/3667 cut-off events. [2024-02-07 19:22:36,362 INFO L125 PetriNetUnfolderBase]: For 4082/4082 co-relation queries the response was YES. [2024-02-07 19:22:36,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10494 conditions, 3667 events. 2065/3667 cut-off events. For 4082/4082 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 20026 event pairs, 1262 based on Foata normal form. 0/3550 useless extension candidates. Maximal degree in co-relation 10478. Up to 2405 conditions per place. [2024-02-07 19:22:36,376 INFO L140 encePairwiseOnDemand]: 46/49 looper letters, 48 selfloop transitions, 2 changer transitions 0/60 dead transitions. [2024-02-07 19:22:36,376 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 60 transitions, 377 flow [2024-02-07 19:22:36,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-07 19:22:36,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-07 19:22:36,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 89 transitions. [2024-02-07 19:22:36,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45408163265306123 [2024-02-07 19:22:36,377 INFO L175 Difference]: Start difference. First operand has 69 places, 47 transitions, 205 flow. Second operand 4 states and 89 transitions. [2024-02-07 19:22:36,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 60 transitions, 377 flow [2024-02-07 19:22:36,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 60 transitions, 373 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-07 19:22:36,382 INFO L231 Difference]: Finished difference. Result has 69 places, 46 transitions, 205 flow [2024-02-07 19:22:36,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=201, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=205, PETRI_PLACES=69, PETRI_TRANSITIONS=46} [2024-02-07 19:22:36,383 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 19 predicate places. [2024-02-07 19:22:36,383 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 46 transitions, 205 flow [2024-02-07 19:22:36,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:22:36,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:22:36,385 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:22:36,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-02-07 19:22:36,385 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 18 more)] === [2024-02-07 19:22:36,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:22:36,386 INFO L85 PathProgramCache]: Analyzing trace with hash -2137937304, now seen corresponding path program 1 times [2024-02-07 19:22:36,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:22:36,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800713915] [2024-02-07 19:22:36,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:22:36,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:22:36,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:22:36,441 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-02-07 19:22:36,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:22:36,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800713915] [2024-02-07 19:22:36,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800713915] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:22:36,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:22:36,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-07 19:22:36,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665707125] [2024-02-07 19:22:36,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:22:36,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 19:22:36,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:22:36,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 19:22:36,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 19:22:36,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 49 [2024-02-07 19:22:36,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 46 transitions, 205 flow. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:22:36,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:22:36,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 49 [2024-02-07 19:22:36,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:22:36,642 INFO L124 PetriNetUnfolderBase]: 1957/3505 cut-off events. [2024-02-07 19:22:36,642 INFO L125 PetriNetUnfolderBase]: For 3548/3548 co-relation queries the response was YES. [2024-02-07 19:22:36,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10126 conditions, 3505 events. 1957/3505 cut-off events. For 3548/3548 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 19105 event pairs, 1349 based on Foata normal form. 0/3388 useless extension candidates. Maximal degree in co-relation 10110. Up to 2568 conditions per place. [2024-02-07 19:22:36,659 INFO L140 encePairwiseOnDemand]: 47/49 looper letters, 48 selfloop transitions, 1 changer transitions 0/59 dead transitions. [2024-02-07 19:22:36,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 59 transitions, 373 flow [2024-02-07 19:22:36,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 19:22:36,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 19:22:36,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 80 transitions. [2024-02-07 19:22:36,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.54421768707483 [2024-02-07 19:22:36,661 INFO L175 Difference]: Start difference. First operand has 69 places, 46 transitions, 205 flow. Second operand 3 states and 80 transitions. [2024-02-07 19:22:36,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 59 transitions, 373 flow [2024-02-07 19:22:36,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 59 transitions, 370 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-07 19:22:36,667 INFO L231 Difference]: Finished difference. Result has 68 places, 45 transitions, 202 flow [2024-02-07 19:22:36,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=202, PETRI_PLACES=68, PETRI_TRANSITIONS=45} [2024-02-07 19:22:36,668 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 18 predicate places. [2024-02-07 19:22:36,668 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 45 transitions, 202 flow [2024-02-07 19:22:36,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:22:36,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:22:36,669 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:22:36,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-02-07 19:22:36,669 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 18 more)] === [2024-02-07 19:22:36,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:22:36,669 INFO L85 PathProgramCache]: Analyzing trace with hash -1851546691, now seen corresponding path program 1 times [2024-02-07 19:22:36,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:22:36,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849367602] [2024-02-07 19:22:36,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:22:36,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:22:36,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:22:36,753 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:22:36,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:22:36,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849367602] [2024-02-07 19:22:36,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849367602] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 19:22:36,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672871184] [2024-02-07 19:22:36,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:22:36,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:22:36,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:22:36,755 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 19:22:36,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-02-07 19:22:36,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:22:36,841 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 6 conjunts are in the unsatisfiable core [2024-02-07 19:22:36,842 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 19:22:36,869 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:22:36,869 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 19:22:36,922 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:22:36,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672871184] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 19:22:36,922 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 19:22:36,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-02-07 19:22:36,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516522962] [2024-02-07 19:22:36,923 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 19:22:36,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-02-07 19:22:36,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:22:36,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-02-07 19:22:36,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-02-07 19:22:36,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 49 [2024-02-07 19:22:36,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 45 transitions, 202 flow. Second operand has 13 states, 13 states have (on average 19.923076923076923) internal successors, (259), 13 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:22:36,934 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:22:36,934 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 49 [2024-02-07 19:22:36,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:22:37,511 INFO L124 PetriNetUnfolderBase]: 4981/7879 cut-off events. [2024-02-07 19:22:37,512 INFO L125 PetriNetUnfolderBase]: For 9497/9497 co-relation queries the response was YES. [2024-02-07 19:22:37,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24549 conditions, 7879 events. 4981/7879 cut-off events. For 9497/9497 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 38332 event pairs, 392 based on Foata normal form. 324/8090 useless extension candidates. Maximal degree in co-relation 24533. Up to 833 conditions per place. [2024-02-07 19:22:37,546 INFO L140 encePairwiseOnDemand]: 45/49 looper letters, 195 selfloop transitions, 12 changer transitions 0/215 dead transitions. [2024-02-07 19:22:37,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 215 transitions, 1506 flow [2024-02-07 19:22:37,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-02-07 19:22:37,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-02-07 19:22:37,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 339 transitions. [2024-02-07 19:22:37,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.576530612244898 [2024-02-07 19:22:37,548 INFO L175 Difference]: Start difference. First operand has 68 places, 45 transitions, 202 flow. Second operand 12 states and 339 transitions. [2024-02-07 19:22:37,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 215 transitions, 1506 flow [2024-02-07 19:22:37,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 215 transitions, 1505 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-07 19:22:37,558 INFO L231 Difference]: Finished difference. Result has 85 places, 52 transitions, 309 flow [2024-02-07 19:22:37,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=201, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=309, PETRI_PLACES=85, PETRI_TRANSITIONS=52} [2024-02-07 19:22:37,559 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 35 predicate places. [2024-02-07 19:22:37,559 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 52 transitions, 309 flow [2024-02-07 19:22:37,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 19.923076923076923) internal successors, (259), 13 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:22:37,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:22:37,559 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:22:37,575 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-02-07 19:22:37,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-02-07 19:22:37,776 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 18 more)] === [2024-02-07 19:22:37,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:22:37,776 INFO L85 PathProgramCache]: Analyzing trace with hash 758074797, now seen corresponding path program 2 times [2024-02-07 19:22:37,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:22:37,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934594773] [2024-02-07 19:22:37,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:22:37,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:22:37,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:22:37,969 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:22:37,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:22:37,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934594773] [2024-02-07 19:22:37,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934594773] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 19:22:37,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720344117] [2024-02-07 19:22:37,970 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-07 19:22:37,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:22:37,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:22:37,976 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 19:22:37,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-02-07 19:22:38,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-02-07 19:22:38,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 19:22:38,054 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 6 conjunts are in the unsatisfiable core [2024-02-07 19:22:38,056 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 19:22:38,096 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2024-02-07 19:22:38,097 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-02-07 19:22:38,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720344117] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:22:38,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-02-07 19:22:38,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [13] total 15 [2024-02-07 19:22:38,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598216135] [2024-02-07 19:22:38,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:22:38,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 19:22:38,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:22:38,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 19:22:38,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2024-02-07 19:22:38,104 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-02-07 19:22:38,104 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 52 transitions, 309 flow. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 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 19:22:38,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:22:38,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-02-07 19:22:38,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:22:38,681 INFO L124 PetriNetUnfolderBase]: 4117/6907 cut-off events. [2024-02-07 19:22:38,681 INFO L125 PetriNetUnfolderBase]: For 12314/12314 co-relation queries the response was YES. [2024-02-07 19:22:38,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23021 conditions, 6907 events. 4117/6907 cut-off events. For 12314/12314 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 35629 event pairs, 2915 based on Foata normal form. 0/6898 useless extension candidates. Maximal degree in co-relation 22999. Up to 5484 conditions per place. [2024-02-07 19:22:38,717 INFO L140 encePairwiseOnDemand]: 46/49 looper letters, 69 selfloop transitions, 2 changer transitions 0/79 dead transitions. [2024-02-07 19:22:38,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 79 transitions, 593 flow [2024-02-07 19:22:38,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-07 19:22:38,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-07 19:22:38,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 94 transitions. [2024-02-07 19:22:38,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47959183673469385 [2024-02-07 19:22:38,718 INFO L175 Difference]: Start difference. First operand has 85 places, 52 transitions, 309 flow. Second operand 4 states and 94 transitions. [2024-02-07 19:22:38,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 79 transitions, 593 flow [2024-02-07 19:22:38,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 79 transitions, 587 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-02-07 19:22:38,736 INFO L231 Difference]: Finished difference. Result has 84 places, 51 transitions, 305 flow [2024-02-07 19:22:38,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=301, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=305, PETRI_PLACES=84, PETRI_TRANSITIONS=51} [2024-02-07 19:22:38,736 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 34 predicate places. [2024-02-07 19:22:38,736 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 51 transitions, 305 flow [2024-02-07 19:22:38,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 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 19:22:38,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:22:38,737 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:22:38,766 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-02-07 19:22:38,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-02-07 19:22:38,941 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 18 more)] === [2024-02-07 19:22:38,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:22:38,942 INFO L85 PathProgramCache]: Analyzing trace with hash -1634551544, now seen corresponding path program 1 times [2024-02-07 19:22:38,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:22:38,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320515470] [2024-02-07 19:22:38,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:22:38,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:22:38,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:22:39,090 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:22:39,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:22:39,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320515470] [2024-02-07 19:22:39,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320515470] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 19:22:39,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485106797] [2024-02-07 19:22:39,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:22:39,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:22:39,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:22:39,092 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 19:22:39,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-02-07 19:22:39,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:22:39,175 INFO L262 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 12 conjunts are in the unsatisfiable core [2024-02-07 19:22:39,177 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 19:22:39,225 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:22:39,225 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 19:22:39,374 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:22:39,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485106797] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 19:22:39,374 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 19:22:39,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 19 [2024-02-07 19:22:39,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336773437] [2024-02-07 19:22:39,375 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 19:22:39,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-02-07 19:22:39,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:22:39,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-02-07 19:22:39,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2024-02-07 19:22:39,382 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 49 [2024-02-07 19:22:39,382 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 51 transitions, 305 flow. Second operand has 19 states, 19 states have (on average 20.157894736842106) internal successors, (383), 19 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:22:39,382 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:22:39,382 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 49 [2024-02-07 19:22:39,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:22:40,530 INFO L124 PetriNetUnfolderBase]: 7573/11713 cut-off events. [2024-02-07 19:22:40,530 INFO L125 PetriNetUnfolderBase]: For 28397/28397 co-relation queries the response was YES. [2024-02-07 19:22:40,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40163 conditions, 11713 events. 7573/11713 cut-off events. For 28397/28397 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 55479 event pairs, 392 based on Foata normal form. 324/11978 useless extension candidates. Maximal degree in co-relation 40140. Up to 1265 conditions per place. [2024-02-07 19:22:40,580 INFO L140 encePairwiseOnDemand]: 45/49 looper letters, 297 selfloop transitions, 18 changer transitions 0/322 dead transitions. [2024-02-07 19:22:40,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 322 transitions, 2405 flow [2024-02-07 19:22:40,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-02-07 19:22:40,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-02-07 19:22:40,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 507 transitions. [2024-02-07 19:22:40,582 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5748299319727891 [2024-02-07 19:22:40,582 INFO L175 Difference]: Start difference. First operand has 84 places, 51 transitions, 305 flow. Second operand 18 states and 507 transitions. [2024-02-07 19:22:40,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 322 transitions, 2405 flow [2024-02-07 19:22:40,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 322 transitions, 2402 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-07 19:22:40,608 INFO L231 Difference]: Finished difference. Result has 106 places, 58 transitions, 450 flow [2024-02-07 19:22:40,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=302, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=450, PETRI_PLACES=106, PETRI_TRANSITIONS=58} [2024-02-07 19:22:40,608 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 56 predicate places. [2024-02-07 19:22:40,608 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 58 transitions, 450 flow [2024-02-07 19:22:40,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 20.157894736842106) internal successors, (383), 19 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:22:40,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:22:40,609 INFO L208 CegarLoopForPetriNet]: trace histogram [16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:22:40,622 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-02-07 19:22:40,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-02-07 19:22:40,820 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 18 more)] === [2024-02-07 19:22:40,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:22:40,821 INFO L85 PathProgramCache]: Analyzing trace with hash -764619016, now seen corresponding path program 2 times [2024-02-07 19:22:40,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:22:40,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673803847] [2024-02-07 19:22:40,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:22:40,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:22:40,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:22:43,087 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:22:43,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:22:43,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673803847] [2024-02-07 19:22:43,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673803847] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 19:22:43,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563557392] [2024-02-07 19:22:43,087 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-07 19:22:43,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:22:43,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:22:43,088 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 19:22:43,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-02-07 19:22:43,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-07 19:22:43,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 19:22:43,179 INFO L262 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 56 conjunts are in the unsatisfiable core [2024-02-07 19:22:43,190 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 19:22:46,402 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 392 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:22:46,402 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 19:22:50,335 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:22:50,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563557392] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 19:22:50,336 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 19:22:50,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52, 52] total 150 [2024-02-07 19:22:50,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415725210] [2024-02-07 19:22:50,336 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 19:22:50,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 151 states [2024-02-07 19:22:50,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:22:50,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 151 interpolants. [2024-02-07 19:22:50,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1471, Invalid=21179, Unknown=0, NotChecked=0, Total=22650 [2024-02-07 19:22:51,608 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 49 [2024-02-07 19:22:51,610 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 58 transitions, 450 flow. Second operand has 151 states, 151 states have (on average 11.185430463576159) internal successors, (1689), 151 states have internal predecessors, (1689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:22:51,610 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:22:51,610 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 49 [2024-02-07 19:22:51,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand